Answer:
T
Step-by-step explanation:
The answer is true, on more than one aspect.
Political boundaries prevent people from easily migrating from one country to another, thus limiting their movement and impacts their behavior (wanting to move)
Geographical boundaries, like oceans or mountains, have the same effect. You cannot have a large population simply walking on water, or go across high mountains, to move away to the other side.
The human behavior will adapt to what it sees as possible and what's not.