The correct answer is **c. fluctuate**. Sleep needs do not remain the same throughout the life span. They change based on age, life stage, and individual factors.

Here's a breakdown of how sleep needs fluctuate:

  • **Newborns and Infants:** Require the most sleep, around 14-17 hours per day.
  • **Toddlers and Preschoolers:** Need 10-13 hours of sleep.
  • **School-Aged Children:** Need 9-11 hours of sleep.
  • **Teenagers:** Need 8-10 hours of sleep.
  • **Adults:** Need 7-9 hours of sleep.
  • **Older Adults:** Sleep needs may decrease slightly, but consistent quality sleep is crucial.

It's important to note that individual sleep needs can vary. If you consistently feel tired or experience difficulties concentrating, it's best to consult a doctor to rule out any underlying medical conditions and discuss personalized sleep recommendations.


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