(2) The reasons why A, B, C and D in Figure 1 are vast and sparsely populated are: A: arid desert; B: hot and humid tropical rain forest; C: alpine plateau with thin air; D: the cold polar regions.
(3) Jia Jia found that the world population distribution is very uneven, some places are dense and some places are sparse. It is impossible to make the world population evenly distributed by artificial means, because the distribution of the world population is influenced by natural conditions, economy, society and history. Generally speaking, natural conditions are superior, industry and agriculture develop earlier, and economically developed areas are densely populated. Areas with poor natural conditions are vast and sparsely populated, so it is impossible to realize the average distribution of population simply by population migration.
(4) In the face of the population crisis, the Russian central and local governments are actively taking measures such as setting up a "mother fund" to encourage childbearing and provide welfare for families with many children, so as to change the population situation. The reason why Russia has done this is that the Russian population has experienced negative growth, so measures such as encouraging childbearing and providing welfare for families with many children have been taken to alleviate the problems of aging population, labor shortage and insufficient national defense soldiers.
(5) According to Figure ③, about 56% of the world's population is mainly distributed in plain areas.
(6) According to Figure ④, due to population growth, thousands of rural people left the countryside and poured into Mexico City, which brought great pressure to urban construction and development. The impact of the influx of rural population into cities on urban construction and development is the migration of rural population to cities, which has brought many problems such as housing shortage and traffic congestion.
(7) The rapid population growth in Asian, African and Latin American countries has put tremendous pressure on social and economic development, and it is difficult to solve the problems of employment, housing, education and medical care, which has affected the national economic development. The solution is family planning.
So the answer is: (1) east and south; Western Europe;
(2) arid desert; Hot and humid tropical rain forest; Alpine plateau with thin air; Cold polar regions;
(3) No, because the distribution of the world population is influenced by many factors such as natural conditions, economy, society and history. Generally speaking, natural conditions are superior, industry and agriculture develop earlier, and economically developed areas are densely populated; Areas with poor natural conditions are vast and sparsely populated, so it is impossible to realize the average distribution of population simply by population migration.
(4) Russia's population is experiencing negative growth, so measures such as encouraging childbearing and providing welfare for families with many children are taken to alleviate the problems of aging population, insufficient labor force and insufficient national defense soldiers;
(5) plains;
(6) The migration of rural population to cities has brought many problems, such as housing shortage and traffic jam.
(seven) causing great pressure on social and economic development, and it is difficult to solve the problems of employment, housing, education and medical care of residents, which affects the economic development of the country; Family planning.