According to the development theory of yawning presented in the passage, what is the function of yawning?
Understand the Problem
The question is asking about the specific role of yawning according to the development theory presented in the passage, focusing on its physiological implications for adults and fetuses.
Answer
It removes a potentially harmful fluid from the lungs.
The final answer is it removes a potentially harmful fluid from the lungs.
Answer for screen readers
The final answer is it removes a potentially harmful fluid from the lungs.
More Information
According to the development theory presented, yawning might help to clear out the lungs in fetuses by periodically lowering the pressure, possibly removing amniotic fluid.
Tips
A common mistake is assuming that yawning's purpose is related to sleepiness or boredom, while it may have developmental functions.
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