Animals are heterotrophic, meaning they rely upon other organisms—crops and/or other animals—for his or her food items, as they can not synthesize their own meals as plants do by way of photosynthesis. The fossil file of animals goes back about 600 million many years to the Ediacaran period of time, https://dominickytlgx.blogs100.com/36952017/animal-porn-no-further-a-mystery