Question

Why do we yawn?
pls tell ​

Answer 1

Answer:

• One 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.

Answer 2

Answer:

when we are tired and feel to sleep or for taking some rest that's why we yawn