Why can a person not swallow food and talk at the same time?

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The brain cannot control two activities at the same time.

In order to speak, air must come through the pharynx to form sounds.

In order to swallow, the epiglottis must close off the larynx (trachea).

Both B and C are correct.

answer is D.

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Detailed Solution

We do talk and consume through the common opening known as mouth.

Speaking in particular entails vibration.
Pharynx is the common passage for air and meals, and after this is wherein the separation takes place.
There is a windpipe or trachea which has a flap known as epiglottis which prevents meals from getting into the windpipe.
While eating, the similar system takes place until the pharynx, and after that meals go into esophagus or food pipe.

Hence, option D is the correct answer.

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