Question

Which biotic factor regulates the population of a community?

• A. The annual pattern of rainfall
• B. The average ration of $O_2$ to $C{O}_2$
• C. The annual pattern of daily temperature ranges
• D. The rate of weathering of rocks into soil
• E. The number of predators and competitors

Answer 1

The correct option is E The number of predators and competitors

Rainfall, the ratio of atmospheric gases, temperature range and weathering constitute the abiotic factor of an ecosystem. The community is a group of populations of different species living together in a habitat. Predators are the carnivores that feed on other living organisms (prey). Two or more populations with the same requirement of a natural resource are competitors of each other. Therefore, a number of predators and competitors regulate the number of population of a community. Thus, the correct answer is E.