Which of the following is NOT a reason we yawn?a.sleepinessb.calmnessc.tension released.seeing others yawn

To determine which option is NOT a reason we yawn, let's analyze each choice:

1. Sleepiness: Many studies suggest that yawning is often associated with fatigue or the need for sleep. When we are tired, yawning can help increase alertness and oxygen intake.

2. Calmness: Yawning may indeed occur in calm situations, as it can be a way for the body to reset or relax. However, this is less commonly cited as a primary reason for yawning compared to sleepiness or transitions between alertness and relaxation.

3. Tension released: Yawning can help release tension and promote relaxation, especially during times of stress or anxiety. It serves as a physical response to relieve built-up tension.

4. Seeing others yawn: This phenomenon is known as contagious yawning, and it occurs due to empathy or social bonding. When we see someone yawn, our own brain may trigger a yawn as well.

Conclusion

Upon reviewing the options, the one that is NOT a generally accepted reason for yawning is b. calmness. While yawning can occur when we feel calm, it is not a prominent or widely recognized reason compared to the other options.