Question

which of the following is/are density - dependent factor(s)? choose all that apply!
disease
fire
predation
temperature

Explanation:

Density - dependent factors are those whose effects on population size change with the population density. Disease spreads more easily in a dense population, so it is density - dependent. Predation also has a greater impact when the prey population is dense (e.g., predators can find more prey easily), so it is density - dependent. Fire and temperature are density - independent factors as their effects do not depend on population density (fire can occur regardless of how many organisms are present, same with temperature changes).

Answer:

A. Disease, C. Predation