Question

Oesophagus, Vocal cords.
Larynx, Vocal cords
Oesophagus, Voice box
Pharynx, Voice box

Answer 1

Answer:

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Larynx and pharynx

Explanation:

Answer 2

Explanation:

Work is said to be done when a Fore F acts on an object and object moves through a distance S in the direction of force. Workdone can be positive , negative or Zero