When a sound wave strikes your eardrum, it causes forced vibrations that are transferred to the
a. brain
c. longitudinal canal
b. outer ear
d. bones in the middle ear

The correct answer is letter D. When a sound wave strikes your eardrum, it causes forced vibrations that are transferred to the bones in the middle ear. As this phenomena occurs, signals are sent to the brain and the brain analyzes the sound and converts it into an understandable signal. 

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