___________ is the movement of people into and out of an area or country.
None of these
The correct option is C Migration
Human migration is the movement
by people from one place to another with the intention of settling, temporarily or permanently in a new location. The movement is often over long distances and
from one country to another, but internal migration is also possible and indeed,
this is the dominant form globally. Migration may be by individuals, family units
or in large groups.