Why do food chains end?

All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal ... Animals cannot make their own food so they must eat plants and/or other animals.

All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal ... Animals cannot make their own food so they must eat plants and/or other animals.