Final answer:
Immigration is the term used to describe individuals moving from another location into a subpopulation.
Step-by-step explanation:
Immigration is the term used to describe individuals moving from another location into a subpopulation. It refers to the movement into an area to take up permanent residence.
This can be voluntary, involuntary, or forced. For example, college students studying abroad is a voluntary immigration, while Syrians evacuating war-torn areas is an involuntary immigration.