Immigrated to the Amazon plain.

Amazon Plain is the largest plain in the world, covering an area of 5.6 million square kilometers.

The highest plateau in the world is the Qinghai-Tibet Plateau, with an average elevation of 4,000-5,000 meters, which is known as the roof of the world.

3. The largest plateau in the world is the Brazilian Plateau, which covers an area of over 5 million square kilometers and is the largest plateau in the world.

4. The largest basin in the world is Congo Basin, with an area of 3.37 million square kilometers.

The longest mountain range in the world is the Andes, with a total length of more than 8900 kilometers from north to south.

1. Amazon Plain (in English: Amazon Basin) is located in the north of South America, in the middle and lower reaches of the Amazon River, between the Guiana Plateau and the Brazilian Plateau, bordering the Andes in the west and the Atlantic Ocean in the east, spanning the territories of Brazil, Peru, Colombia and Bolivia, with an area of 5.6 million square kilometers (of which Brazil has more than 2.2 million square kilometers, accounting for about13 of the national territory). The Amazon plain is densely covered with tropical rainforests, with a wide variety of plants and rich endemic species; There are many kinds of animals, especially arboreal animals. The mineral deposits are mainly oil. The land is vast and sparsely populated, with a total population of about150,000, including10,000 Indians living in dense forests. Since the 1960s, there have been plans to organize immigrants, develop agriculture and animal husbandry, and develop natural resources, and Amazon highways have been built all over the country.

The rainforest is like a giant throughput machine. Forests absorb a lot of carbon dioxide emitted by the world every year. The existence of this gas warms the earth, harms the climate, and even melts the polar ice sheets, causing floods. Trees also produce oxygen, which is necessary for human beings and all animals to live. The Amazon rainforest is therefore called "the lung of the earth". If the Amazon forest is completely cut down, the oxygen on which human beings depend will decrease 1/3. Trees in some rainforests grow very tall, more than 60 meters high. Their leaves form a "crown", like an umbrella, blocking the light. Few low plants grow under the tree. The whole Amazon Plain belongs to the tropical rain forest climate, which is the most extensive equatorial rainy area in the world. Controlled by the equatorial low pressure belt all the year round, updraft prevails and convective rainfall is more. The annual average temperature is 27-28℃, and the annual average precipitation is between 1500-2500mm.

2. The Qinghai-Tibet Plateau is the largest plateau in China and the highest plateau in the world. Known as the "roof of the world" and "roof of the world". It starts from the southern edge of Himalayas in the south, reaches Kunlun Mountain, Altun Mountain and the northern edge of Qilian Mountain in the north, reaches Pamir Plateau and Karakorum Mountain in the west, and borders western Qinling Mountain and Loess Plateau in the east and northeast, with latitude of 26 00 ′ ~ degrees north latitude. ?

The Qinghai-Tibet Plateau is about 2,800 kilometers long from east to west and 300 ~ 1.500 kilometers wide from north to south, with a total area of about 2.5 million square kilometers. Topographically, it can be divided into six parts: Northern Tibet Plateau, Southern Tibet Valley, Qaidam Basin, Qilian Mountain, Qinghai Plateau and Sichuan-Tibet Alpine Canyon, including all Tibet in China and parts of Qinghai, Xinjiang, Gansu, Sichuan and Yunnan, as well as Bhutan, Nepal and India.

The natural and historical development of the Qinghai-Tibet Plateau is extremely young. Influenced by many factors, it has formed the highest and youngest natural geographical unit in the world, with a close combination of horizontal zonality and vertical zonality. The annual average temperature in the hinterland of the plateau is below 0℃, and the monthly average temperature in the warmest area is also below 10℃. The Qinghai-Tibet Plateau is generally between 3000 and 5000 meters above sea level, with an average elevation of more than 4000 meters. It is the birthplace of many rivers in East Asia, Southeast Asia and South Asia. There are many lakes on the plateau, including Namtso and Qinghai Lake.

3. The Brazilian Plateau (Portuguese: PlanaltoBrasileiro) is a vast plateau located in Brazil in the east of South America, with an area of more than 5 million square kilometers, making it the largest plateau in the world.

Brazil is divided into five climatic zones: humid equatorial zone, humid tropical zone, semi-humid tropical zone, semi-arid tropical zone and humid subtropical zone. The average temperature rises slowly from south to north. However, although the Amazon basin is located in the equatorial belt, the temperature is not as high as people think, with the average temperature not exceeding 27℃ and the highest temperature not exceeding 36℃. The average temperature in plateau cities such as Brasilia and Sao Paulo is only 19℃, and the climate is pleasant. The average temperature in the south subtropical region is 16℃-20℃, and in some places with high terrain, the average temperature is only 10℃, and sometimes it snows in winter. However, the humidity in all parts of Brazil is quite high, especially in coastal areas. The annual rainfall varies from region to region. The maximum annual rainfall in humid equatorial Amazon region is1500mm-2500mm. Only August-10 is the rainy season.

4. Congo Basin is located in central and western Africa, and it is square with the equator passing through it. The area is about 3.37 million square kilometers. It is located between Lower Guinea Plateau, South Africa Plateau, East Africa Plateau and Low Azande Plateau, and is located in Cameroon, Central Africa, Democratic Republic of Congo, Equatorial Guinea, Gabon and Congo.

This is a tectonic basin with undisturbed thick sedimentary rocks at the bottom, forming a flat and monotonous terrain. Only some sporadic low cliffs caused by faulting have broken this monotonous landscape to some extent. Sedimentary rocks are deposited in the inner lake. Later, due to the rising of the earth's crust, the original Congo River (Zaire River) passed through the western edge of the basin, and the inner lake gradually disappeared. Today, two large lakes in the southwest of the basin are its remnants. The basin is surrounded by slopes of adjacent plateaus, and its basement crystalline rocks are widely exposed.

Verb (abbreviation of verb) Andes (Quechua: Andes; Chichua: Antis) belongs to the Cordillera mountain system, also known as the Andes or Andes. It is located on the west coast of South America, with a total length of more than 8,900 kilometers from north to south, and is the longest mountain range in the world.

The Andes form a continuous barrier from the southern tip of South America to the northernmost tip of the Caribbean Sea. The Andes separates the narrow west coast from the rest of the mainland, which is one of the important topographical features of the earth and has a far-reaching impact on the living conditions of the mountains themselves and their surrounding areas. Aconcagua, located in Argentina, is 6962 meters above sea level. It is the highest peak in the western and southern hemispheres and the highest extinct volcano in the world.