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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.
For example, an herbivore that eats a plant, gets only 10% of the total energy possible from the plant, so the animal has to eat more to get energy to survive. The food web is web shows each and every connection between animals. An energy pyramid only shows the transfer of energy between each group as a whole, such as primary consumer to secondary consumer) Source(s): Me