Question

Why do we yarn? If we see a person yarn we too yarn. What is the reason behind this?

Answer 1

Answer:

yawn is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood.

The reason that it's hard to stifle a yawn — especially when someone nearby is doing it and you're trying hard not to — appears to reside in the area of the brain that's responsible for motor function, a new study from England finds. Contagious yawning isn't unique to humans, either.

Explanation:

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Answer 2

Answer:

lack of oxygen

Explanation:we yarn due to lack of oxygen