Please I need help with my homework I have to turn it in tomorrow morning

Some factors that may cause a decrease in population size:

- a high mortality rate due to an infectious disease

- a low birth rate

- a high mortality rate due to interspecific competence  

- a high emigration rate

Explanation:

In biology, population size (N) refers to the total number of individuals in a given population. The four main factors that affect population size are birthrate (natality), death rate, immigration rate (i.e., the number of individuals of a given species that move into a population), and emigration rate (i.e., the number of individuals of a given species that move out of a population). Both birthrate and immigration are known to increase N, while death rate and emigration are rates known to decrease this value.

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