Sleep was once viewed by many researchers as a passive state — a pause between waking activities. Modern neuroscience treats it very differently: during sleep, the brain consolidates memories, clears metabolic waste, and rebalances neurotransmitter systems. Sleep, in this account, is not the absence of work but a different kind of work the brain cannot accomplish while awake.
Which choice best states the main idea of the text?
- A
The brain works only during waking hours.
- B
Sleep is a passive state.
- Ccheck_circle
Modern neuroscience views sleep as an active, biologically essential process rather than mere rest.
- D
Sleep is unimportant for memory.
Explanation
The passage reframes sleep as active work — B. A is the view revised; C and D contradict the text.