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Rainforest are divided between the emergent, canopy, understory, and forest floor. Trees in the emergent layer can reach heights of 200 feet. The canopy is the primary layer and provides cover for the two layers beneath it; many animals live in this layer as food is plentiful. The understory doesn't receive much sunlight so plants don't grow very tall but many animals and large concentrations of insects live here. The forest floor is really dark so plants don't grow there; this is where decomposition takes place, and is much quicker here than in other forests.
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