Which of the following has to happen before the eardrum begins to vibrate with the same frequency as the source of the sound waves? a. vibrations have to be transmitted to the fibers of the auditory nerve. b. impulses have to be sent to the brain through the auditory nerve. c. the outer ear has to collect the sound waves and lead them to the middle ear. d. the brain has to interpret the direction from which the sounds are being delivered.

C. The outer ear has to collect the sound waves and lead them to the middle ear.

Explanation:

In the process of hearing, the first thing that happens is that sound waves enter the outer ear through a passage called "auditory canal" that reaches the eardrum.

The movement of the incoming sound waves causes the eardrum to vibrate and transmit these vibrations to three tiny bones of the middle ear.

the device is called “ rocket engine”

i think its c if i'm wrong