Question

a population of elephants becomes too large, and several members leave the population. what is this process called?
death rate
immigration
emigration
births

Explanation:

Emigration is the movement of individuals out of a population. In this case, elephants are leaving their population due to it being too large. Immigration is the movement into a population, death - rate is related to the number of deaths in a population, and births are related to new individuals being added to a population.

Answer:

C. emigration