What happens during a migration

Human migration involves the movement of people from one place to another with intentions of settling, permanently or temporarily, at a new location (geographic region).

Explanation:

Human migration involves the movement of people from one place to another with intentions of settling, permanently or temporarily, at a new location (geographic region).

OR

The movement of a person or people from one country, locality, place of residence, etc., to settle in another; an instance of this. Migration is, first and foremost, a normal human activity. Human beings have always moved from 'one country, locality, [and] place of residence to settle in another'.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.