C;

8. which of the following best describes how a biotic factor can limit the population growth in a species?

a. a parasite invades the species and causes its population to decline.

b. a sudden drop in temperature causes nearly half of the species’ population to die.

c. disease leads to a decline in the reproductive rate of the species’ main predator.

d. lack of rainfall over a long period of time forces the species to migrate to a new location.