Everylivingthingneedsenergytogrow,move,andstayalive.Almostallofthatenergystartswiththesun.Butanimalscannoteatsunlight!Instead,energytravelsfromonelivingthingtoanotherthroughfood.Scientistsusefoodchainsandfoodwebstoshowhowthatenergymovesthroughanecosystem,whichisacommunityoflivingthingsandtheirsurroundings.

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