There are both socio-economic factors and natural environmental factors that affect population migration, and population migration has a great impact on the environment of the places where people move

There are both socio-economic factors and natural environmental factors that affect population migration, and population migration has a great impact on the environment of the places where people move in and out.

Question 1:B

Question 2:C

Question 3:C

Question 1: This question examines the influencing factors of population migration. Natural factors include topography, soil, climate, water, minerals and so on. Among them, living on weeds is to find a place with water to live and produce. Select item B.

Question 2: This question examines the problems of population migration and population mobility. Studying abroad is a phenomenon of population mobility. The migrants in Xiaolangdi reservoir area of the Yellow River are policy migrants, and the migration of migrant workers is spontaneous. Anti-urbanization phenomenon In the process of urbanization in developed countries, population flows from cities to rural areas. Match c.

Question 3: This question examines the influencing factors of population migration. From the natural environment factors, socio-economic environment factors, political factors, environmental factors and other aspects of analysis. The migration of Afghan population to neighboring Pakistan is due to the migration caused by war, and it is a war refugee, which belongs to political factors. Select item C.