Question

s like predation can have a positive benefit to the population of prey organisms because predators keep prey populations below their _____________. competition level sustainability number exponential growth point carrying capacity

Explanation:

The carrying capacity is the maximum population size of a species that an environment can sustain indefinitely. Predators help keep prey populations below this limit. There is no such thing as a "sustainibility number" in this context. Exponential growth is a type of population - growth pattern and competition level is not what predators keep prey populations below.

Answer:

D. carrying capacity