Why do humans and animals need sleep? i will give brainliest

Humans and animals need sleep, because during sleep, our brains restore themselves, and we rebuild the energy that we lost while we were awake, while saving calories while sleeping. We also sleep to be able to have better brain processing and memory consolidations.

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photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.