Name the four factors that affect population growth. Then, explain how each factor contributes to population growth.

Answer:

The four factors that affect population growth are birth rate, death rate, immigration, and emigration. Birth rate and immigration both add individuals to a population, which increases its size. Conversely, death rate and emigration both remove individuals from a population, which decreases its size. Total population growth is calculated as (birth rate + immigration) - (death rate + emigration).