Which statement best describes a function of sleep?

Which statement best describes a function of sleep?

• A. Reduces memory
• B. Promotes dehydration
• C. Disrupts immune function
• D. Restores energy and clears the mind

Answer: (D)

Sleep serves to restore energy and clear the mind by replenishing energy stores and allowing the brain to process information and remove waste. This clearing of waste supports improved attention, learning, and mood the next day. In addition, memory consolidation occurs during sleep, which aligns with restoring mental function. The other statements don’t fit: sleep does not reduce memory; it actually helps memory formation. It does not promote dehydration—hydration is separate from sleep. And sleep does not disrupt immune function; adequate sleep supports immune health, while insufficient sleep can weaken it.

Sleep serves to restore energy and clear the mind by replenishing energy stores and allowing the brain to process information and remove waste. This clearing of waste supports improved attention, learning, and mood the next day. In addition, memory consolidation occurs during sleep, which aligns with restoring mental function. The other statements don’t fit: sleep does not reduce memory; it actually helps memory formation. It does not promote dehydration—hydration is separate from sleep. And sleep does not disrupt immune function; adequate sleep supports immune health, while insufficient sleep can weaken it.