Everything that is alive needs energy . All animals get the energy they need food. people are animals, too. You can take the human body as an (amaze) machine. It can do all kinds of wonderful things. Food is the fuel that helps keep the machine (run). Plants use the sunlight to make their own food animals are not able to do that. Some animals eat plants . Some animals eat other animals as meat. Some animals, people , eat both plants and animals .