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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.
Biomass is indicated as grams per meter squared. In general, this pyramid is a vertical triangle with few exceptions of inverted pyramids, which can occur in a pond eco system. The next type of food pyramid shows the relationship between the size of the population and the level. The number of organisms is decreasing gradually when the level is increasing. The variation of forwarded energy in a food chain is explained by energy pyramids.