What makes the Rainforest one of the most unique places on Earth?

How important is the Rainforest to life on Earth? How many animals call the Rainforest home? What are the different types of Rainforest? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .