Hearing organs are housed within the in the inner ear.
The correct answer is - the cochlea.
In the ear or to say inner ear or labyrinth have two major structure namely, the cochlea and the vestibular system. The vestibular system is associated with maintaining balance whereas the cochlea involves in hearing.
The cochlea is the auditory inner ear that turns sound into neural signals. The role of the cochlea is to change the sound vibrations of the cochlear fluid and related structures into a nerve signal.
Thus, the correct answer is - the cochlea.