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Question: The body naturally relaxes between 12:00-1:00a. m. and 4:00-5:00a. m. This is referred to as our ___________________.

Options:

  1.  REM cycle
  2.  Sleep schedule
  3.  Celestial pattern
  4.  Circadian rhythm

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4. Circadian rhythm

The body naturally relaxes between 12:00-1:00a. m. and 4:00-5:00a. m. This is referred to as our Circadian rhythm.

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