According to the passage, what does the brain do during deeper stages of sleep?
When we learn something new, the brain does not store it at once in its final form. During sleep, and particularly in its deeper stages, the brain replays the day's experiences and strengthens the connections that matter. Researchers have found that students who sleep after studying often remember more than students who stay awake for the same period. Sleep does not make up for a lack of study, but it helps to fix what has been studied. Staying up all night before an exam may therefore be a poor trade, since the hours gained for study may cost more in lost memory than they give.
Answer and explanation
Correct answer: B. It replays experiences and strengthens important connections
- Step 1: The second sentence says the brain replays the day's experiences and strengthens connections that matter.
- Step 2: That is the activity described.
Answer
It replays experiences and strengthens important connections.
Why not the others: Nothing is said about deleting memories, and storage begins during sleep, not after waking.
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