The three social changes that can result from an increase in population include fertility rates, mortality rates and migration.
For population increase two factors or ways are described which are birth or death, immigration and emigration.
A population's increase is resolved by death, birth, immigration, and emigration. When a population's birthrate is higher than its death rate the population size, The population size is rises.
Also,The two factors responsible for the decrease in size of a population are emigration, which is the migration of an individual from a place. and mortality, which is the number of individual deaths in a population over a period of time.
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