Ecologists gather a lot of evidence from ecosystems. One useful piece of evidence is what each population eats. How do
you think knowing "what eats what" helps ecologists to explain changes in population size? Write your answer below.

Knowing what eats what helps them decide and estimate how a species may decrease/increase. For instance, if a predator eats away all the prey, they will grow for a small while. But suddenly start dying off till they find another source of food/if their prey comes back.