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Sleep helps to fuel your brain and your body. Teens need more sleep because their bodies and minds are growing quickly. Scientific research shows that many teens do not get enough sleep. To be at your best, you need between 8 and 10 hours of sleep every day.
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Answer:
Ancient civilization refers specifically to the first settled and stable communities that became the basis for later states, nations, and empires
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Textual evidence and quotes from text
