Question

B) Answer the following questions in one sentence a) What is
sound ?
answer please​

Answer 1

Explanation:

physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.

Answer 2

Answer:

Sounds are vibrations that travel through a medium like air or water and can be heard through our ears.

Or you can write

Sound is a form of energy which produces the sensation of hearing in our ears.

Hope this helps...