In an ecosystem in africa, lions are predators for zebras. the lion population increases, and they eat more zebras. this decreases the zebra population. what happens next?
a. the death rate of lions increases.
b. the lion population increases.
c. the birth rate of zebras increases.
d. the birth rate of lions increases.

The correct option is A. This is because, as the population of zebra decreases, the lion population will have less food to eat. Since there is no enough food to go round again, competition will set in among the lions and only the fittest will survive, those that did not survive will die, thus, increasing the death rate among lions.