Answer:
The answer is pressure
Step-by-step explanation:
Sound waves are produced as a result of vibrating bodies which causes the surrounding air to vibrate thereby producing disturbance which travels out in form of longitudinal waves
Sound waves can also be referred to as pressure waves because the compression and refraction that moves through sound waves are of varrying pressure.
The effect of the varrying pressure is responsible for the sound you hear.
I hope I answered your question.