Laura, a 14-year-old Dutch girl, has been looking forward to sailing around the world alone and becoming the "youngest person" to sail around the world alone. Figure 1 shows Laura's plan.

As can be seen from the map, (1)A is the Atlantic Ocean, the second largest ocean in the world; ? C is the Malacca Strait, which ri originally called the lifeline of the sea. < P > (2) D India is located in South Asia. In summer, due to the different arrival time and intensity of southwest monsoon, the interannual variability of precipitation is large, which is prone to droughts and floods, causing different degrees of damage to agricultural production. B Australia is located in the Indian Ocean plate, with relatively stable crust and few earthquakes; C is located near the junction of Asia-Europe plate and Indian Ocean plate, with active crust and frequent earthquakes. B Australia, with warm and humid climate, convenient transportation, early immigration and developed economy, has a concentrated population and cities here. (3) Southwest Australia has a Mediterranean climate, which is characterized by high temperature and little rain in summer and mild and rainy in winter; Because Australia is located in the southern hemisphere, the temperature is high in January and low in July, which shows the climate of Australia. < P > So the answer is:

(1) Atlantic Ocean; Straits of Malacca;

(2) The arrival time and intensity of southwest monsoon are different, so the interannual variability of precipitation is large; Located in the Indian Ocean plate, the crust is relatively stable; At the junction of the Eurasian plate and the Indian Ocean plate, the crust is active; Warm and humid climate, convenient transportation, early immigration and developed economy;

（3）A．