Answer:
The more different types of plants there are to eat the more different types of animals will adapt and speciate to eat them. Look at the adaptive radiation of Darwin's finches. The varieties of plants on the Galapagos caused the finches to adapt to the various ways of making a living from the diversified plants. Any tome a plant diversifies the possibility is that an animal will adapt to take advantage of the new resource by the usual means. Natural selection and the evolution.