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satela [25.4K]
4 years ago
13

Hello there help me please!!!!!!!!!

Biology
2 answers:
astra-53 [7]4 years ago
4 0

Answer:

a) when they are tired

Explanation:

When people feel tired and sleepy, they go to bed. It's not b because you can't go to sleep while your brain is awake. Hope this helps.

Nadya [2.5K]4 years ago
3 0

Answer:

When they are tired.

When people are tired, they go to bed. When they are excited and energetic, they are probably done sleeping. Hope it helps!

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