Cheetahs can run extremely fast because:. a. They are competing with stronger lions and hyenas for their food, so they need to be fast
b. Their ancestors who were able to run fast had an advantage and passed those genes on to their offsprings
c. They need to outrun lions
d. All of the explanations are correct
e. Over time, they gradually built up speed as they adapted to faster and faster prey species

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.

Since the black bears eat both fruit and meat that makes them an omnivore