Answer :
The vocal cords in our throat vibrate when we speak.
⇒ In human, the sound is produced by the voice box (larynx)
⇒ The voice box is at the upper end of the windpipe.
⇒ Two vocal cords are stretched across the voice box.
⇒ When the lungs force air through the slit, the vocal cords vibrate and produce sound.
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