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Ecology/food chain

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Question
Can you PLEASE EXPLAIN THE FOOD CHAIN AND ITS PURPOSES?
THANK YOU

Answer
The purpose of the food chain is to illustrate the trophic relationships between living things What eats what in order to gain energy, It is better described as a food web because most animals do not feed on a single species. At the bottom of the food cahin or web are the producers (green plants)that make food by photosynthesis. Next come the first order consumers that eat the plants and then the second order consumers that eat the first order consumers.  

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