This structure connects the middle and inner ear. It allows vibrations to pass into the Cochlea. Oval Window

Auditory Canal

Hearing Aid

Cochlear Nerve

Structure that connects the middle and inner ear and allows vibrations to pass into the Cochlea is oval window.

Explanation:

The oval window is a membranous structure in relation to the stirrup, the ossicle of the middle ear, whose function is to transmit the vibrations it receives to the inner ear, specifically to the cochlea.

Sound coming from outside produces vibrations received by the eardrum, and transmits these vibrations to the hammer, anvil and stirrup, which also makes the oval window vibrate. Vibrations that reach the cochlea mobilize the liquid that is there, which translates vibrations into nervous impulses.

One can say the oval window is the separation between middle and inner ear.

Other options are not correct because:

The auditory canal is part of the outer ear, and transmits sound from the outside to the eardrum. Hearing aid is a device that allows you to hear when hearing acuity has decreased. The cochlear nerve transmits sound related information in the form of nerve impulses.

True. the more you know, the better of you will be.

1.)dr. natterson- horowitz came to realize that their isn't much of a difference between animals and humans. just like humans, animals can suffer from illnesses and diseases like breast cancer, self injury, anxiety, and many more. she also discovered how they even treated and performed surgical procedures on animals just as if the animal it self were human. the los angeles zoo called dr. natterson- horowitz because they knew that she was a doctor and that  she would be able to recognize what was wrong with the gorilla. they knew that humans and gorillas were similar, so instead of calling another veterinarian, they called a doctor.