Humans and animals eat plants. They give us the sugar they store as energy . Animals and humans get energy from eating other animals, too.

When living things die their energy does not disappear. Decomposers turn dead animals and plants into food for other plants. The energy moves in a circle, like in this picture. 


http://king.portlandschools.org/files/houses/y2/animalmaineia/files/species/coyotebq/foodweb/foodchain.jpg