The answer is imperialism
The extent to which environmental factors drove new patterns of migration in the 1750 to 1900 time period was very high and pronounced.
<h3>What is Migration?</h3>
This is the process which involves the movement of people from one place to another to settle down at a new location.
Migration was high in places which had more food, favorable temperature and very little parasites which was why people move to developed countries were on the rise as their chances of survival is high.
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The founder of he Han dynasty was Liu Bang
