The answer is <span>C) Species are populations that interbreed and produce fertile offspring</span>
Species is a group of similar organisms able to reproduce (to exchange genes and interbreed) only within the group and produce fertile offspring. That means that organisms from different species could not exchange genes. Even if they do in some cases, there are pre- and postzygotic mechanisms which prevent having them fertile offspring.
Increases because there's more food for the carnivores, as a result, the gradually the herbivores will decrease as the reach to a point they are no longer able to feed all the predators