What is the importance of different forms of life on the earth?

its to make the food chain. if you don't know what a foo9d chain is: its a cycle of animals, bugs, and plants eating each other to keep the animal, bug, and plant population in its place so we don't have an over population of animals, plants, and bugs. for instants: if all the snakes died there would be to many rats and rodents, and then some of the birds that eat snakes wouldn't have food and they would die.