Question

practice it
membrane - covered opening that separates the middle ear from the inner ear
oval valance
oval banister
oval door
oval window
oval gable

Explanation:

The oval window is a membrane - covered opening that separates the middle ear from the inner ear. It is an important structure in the auditory system as it transmits sound vibrations from the middle ear (specifically from the stapes bone) to the inner ear. The other options are incorrect terms. "Oval valance", "oval banister", "oval door", and "oval gable" are not anatomical terms related to the ear.

Answer:

oval window