Question

three bones in the middle ear that vibrate in response to vibrations of the eardrum
cochlea
semicircular canals
ossicles
organ of corti
eardrum

Explanation:

• Cochlea: Part of the inner ear involved in hearing and balance, not the three middle - ear bones.
• Semicircular canals: Part of the inner ear for balance, not the vibrating bones in the middle ear.
• Ossicles: The three tiny bones (malleus, incus, stapes) in the middle ear that vibrate in response to eardrum vibrations.
• Organ of Corti: In the cochlea (inner ear) for converting sound vibrations to nerve signals, not the middle - ear bones.
• Eardrum: Receives sound waves and vibrates, but it is not the three bones in the middle ear.

Answer:

ossicles