Question

a population of alligators lives in a wetland habitat. which of these describes a density - dependent factor that could affect this population?
○a. humans introduce pollutants into the water of the ecosystem.
○b. there is a decrease in prey animals in the ecosystem.
○c. a drought that lasts for several months occurs.
○d. a hurricane passes through the area.

Explanation:

Density - dependent factors are influenced by population density. A decrease in prey animals (Option B) directly relates to the alligator population's density as more alligators would lead to more competition for fewer prey. Pollutants (A), drought (C), and hurricane (D) are density - independent factors as their impact is not related to population density.

Answer:

B. There is a decrease in prey animals in the ecosystem.