Question

the overall population of a species has increased. what could have occurred to allow this to happen?
the emigration rate is greater than the death rate
the death rate of the population is greater than the immigration
the birth rate of the population is less than the death rate
the immigration of the population is greater than the emigration.

Explanation:

Population change is influenced by birth - death rates and migration. Immigration adds individuals and emigration removes them. If immigration is greater than emigration, more individuals are added than removed, leading to population increase.

Answer:

The immigration of the population is greater than the emigration.