Question

Which of the following best explains how a biotic factor can control the population of a species in an ecosystem?

A sudden drop in temperature may cause many individuals in a population to die.
Competition between two species may force one of them to migrate to survive.
Disease may lead to a decline in the reproductive rate of the species’ main predator.
Lack of water during a drought may cause many of the individuals in a population to die.

Answer 1

I think the actual answer is "Competition between two species may force one of them to migrate to survive."