The cochlea i) amplifies sound vibrations ii) collects sound pressure waves iii) detects the frequency of sounds

The correct answer is option (i), amplifies sound vibrations

Explanation:

Cochlea is part of the inner ear that is responsible for receiving the sound vibrations. The received sound vibration is then converted into nerve impulses which are then send  to the brain for interpretation. Cochlea amplifies the sound so that they can be easily detected even by a damaged ear and it is also able to stimulate the hearing nerve directly.

terd muffin is the correct answer