Question

Which body part is useful to make the basic sound of the voice in humans?
A) Vocal folds in the larynx
B) Lungs
C) Windpipe
D) Throat

Answer 1

Hint: Humans have a body part that consists of vocal folds which helps in producing a sound that we call voice. We will use this information to determine the body part useful to make basic sounds by humans from the options that are given in the question.

Complete answer:
A sound is a form of energy that travels in the form of waves which gives us hearing experience. Sound is produced because of vibrations that generate longitudinal waves that are sound waves. Whenever we speak loudly and touch our throat, we feel vibrations that generate sound.
In humans, voice is produced by the larynx or the voice box present in the upper region, near the throat, of the human body. The larynx is present near the upper end of the windpipe. Two vocal cords are present across the larynx stretch in such a way that it leaves a narrow space between them for the passage of air to flow which comes from the lungs.
When a human speaks, the muscles in our throat stretch and compress changing the space between the larynxes. When air is made to pass through this space, the vocal cords vibrate depending on the space between the larynxes. With the tightening of vocal cords, higher frequency vibrations of the air are created and hence higher volume of sound is produced and vice versa. This is how humans can generate different kinds of pitches.
Hence the correct choice is option (A).

Note:
While the throat seems like the correct choice, the larynx that is located near the upper end of the windpipe and above the throat, and it generates the sound in humans. This sound then travels through the top portion of the neck and the mouth and is then heard as a voice.