The immigration rate and the emigration rate are equal in case of a stable population.
Option A
Explanation:
A stable population is defined as the number of individuals residing in an environment with a limited resources and the number of individuals residing more or less remains constant. In case of a population, there are different factors which tends to divert the population out of the stability, like immigration or emigration. Immigration is the addition of individuals to the population from outside which increases the population, and emigration is the loss of individuals which decrease the population. In case of a stable population, the number of immigrants and emigrants remain more or less same, which maintains a stable population.
