What is a fact about yawning?

It is a result of fatigue or sleepiness.

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It happens after birth.

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It is something we cannot control.

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It is something only humans do.

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Solution

The correct option is A
It is a result of fatigue or sleepiness.

Yawning is a mostly involuntary process of opening the mouth and breathing in deeply, filling the lungs with air. It's a very natural response to being tired. Yawning is usually triggered by sleepiness or fatigue.

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Question 13
Whenever we feel drowsy or sleepy, we start yawning. Does yawning help us in anyway?

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