Concept:The cochlea is the sensory organ in the inner ear specialised for hearing.
Explanation:Sound waves enter the ear and cause fluid inside the cochlea to vibrate.
These vibrations move tiny hair cells in the organ of Corti within the cochlea.
The hair cells convert the vibrations into electrical impulses.
The auditory nerve carries these impulses to the brain, where they are perceived as sound.
The other parts listed are mainly involved in balance, not hearing.
The sacculus and utriculus detect linear acceleration and head position.
The ampullae detect rotational movement of the head.
Answer:B. cochlea