Question

When the lungs force air through the
slit, the vocal cords vibrate, producing
sound. Muscles attached to the vocal
cords can make the cords tight or loose.
When the vocal cords are tight and thin,
the type or quality of voice is different​

Answer 1

Answer:

the article.

In humans, vocal cords, also known as vocal folds or voice reeds are folds of tissue in the throat that are key in creating sounds through vocalization. The size of vocal cords affects the pitch of voice. Open when breathing and vibrating for speech or singing, the folds are controlled via the recurrent laryngeal branch of the vagus nerve. They are composed of twin infoldings of mucous membrane stretched horizontally, from back to front, across the larynx. They vibrate, modulating the flow of air being expelled from the lungs during phonation.[1][2][3]

Answer 2

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If the vocal chord is tight and thin it will produce a high frequency sound or you can say that it will produce high pitch sound ( as pitch of the sound is directly depends on the frequency of the sound). a thick and loose vocal chord will produce the sound of low frequency or low pitch.