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Answers. 1  A food chain is the what animal eats what animal. It really should be called a food web because many animals eat many other animals. The food web is a representation of an energy pyramid. An energy pyramid just shows where the energy is going. The sun is at the bottom, then plants and so on. There really are not many differences between them.
A food web is a diagram of the links among species in an ecosystem-essentially who eats what. A food chain shows only the organisms that contribute to the diet of the top consumer. You could present your diagram as a food web pyramid.