What are some things that might happen that would cause this population to increase ?

Population growth is based on four fundamental factors: birth rate, death rate, immigration, and emigration.

Explanation:

The two factors that increase the size of a population are natality, which is the number of individuals that are added to the population over a period of time due to reproduction, and immigration, which is the migration of an individual into a place.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.