Your voice lowers in pitch when _____.

your throat muscles stretch your vocal cords
your throat muscles relax your vocal cords
your lungs push air across your vocal cords
the vocal cords inside your larynx vibrate

1 answer

The correct answer is: the vocal cords inside your larynx vibrate.

When you speak, the vocal cords vibrate, producing sound waves. The pitch of your voice is determined by the frequency of these vibrations. A lower pitch indicates slower vibrations, while a higher pitch indicates faster vibrations.
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