Biology

The correct answer is: C.Immigration and birth.

Explanation:

For a population to grow, it needs two key processes:

1.Immigration: This refers to individuals moving into the population from another area. When more individuals enter the population, the total population size increases.

2.Birth: The birth of new individuals within the population adds to its size, contributing to population growth.

Now, let's break down the other options:

A.Emigration and death: Emigration refers to individuals leaving the population, and death decreases the population size. These p...