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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.
Why does an energy pyramid show a decrease of energy in every trophic level? Much of the energy from the organism consumed is lost as heat. The higher the trophic level, the less energy needed for survival.All of the energy is converted to the mass of the larger organism in the food chain.hy does an energy pyramid show a decrease of energy in every trophic level? Much of the energy from the organism consumed is lost as heat. The higher the trophic level, the less energy needed for survival.