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A food web is made up of interrelated food chains. Many animals and plants share the same habitat and they all live happily together. Nature balances things so that the food webs last a long time.

Energy begins with the sun. It helps make the grass grow. The grass is a producer because it provides food for many animals. The grasshopper is a consumer and eats the grass. The snake consumes (eats) the grasshopper and is then eaten by the hawk. When the hawk dies, his body is broken down into nutrients (food) by fungi which is a decomposer. This provides nutrients for the grass. The food chain is a cycle of energy.

The following illustration shows a simplified food web in a marsh ecosystem