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Question
The part of the ear that vibrates in response to sound waves is:
Options:
A .  Pinna 
B .  Cochlea
C .  Eustachian tube  
D .  Eardrum
Answer: Option D
:
D
Ear drum is the part of the ear that vibrates in response to the sound waves.The eardrum is a thin flap of skin that is stretched tight like a drum and vibrates when sound hits it. These vibrations move the tiny bones of the middle ear which send vibrations to the inner ear.

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