Answer: adaption I believe as they are in there own surroundings
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A. Chemical because there alot of chemicals that contains energy such as Carbohydrates which fruit and vegetables contain.
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For every pound lost, replace it with 16 to 20 ounces of fluid
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An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.
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