Job Recruitment Website - Ranking of immigration countries - The main reasons of population migration in the history of China are () (1) migration, (2) war, (3) national policies and (4) natural disasters.

The main reasons of population migration in the history of China are () (1) migration, (2) war, (3) national policies and (4) natural disasters.

D

This question examines population migration. Examples: ① Migration in Han Dynasty-population migration caused by migration; ② "An Shi Rebellion" caused a large number of people to migrate from the Yellow River basin to the Yangtze River basin-war; (3) Several "burst banks" in the history of the Yellow River caused a large number of people to flee their homes-natural disasters.