Question

answer in one sentence. 1)what is a sound? ​

Answer 1

$\huge\tt \underline \red{A} \underline\blue{N} \underline \pink{S} \underline\green{W} \underline\orange{E} \underline\purple{R}$

$\implies$Something that you hear or that can be heard

आवाज़, ध्‍वनि (ऐसी चीज़ जिसे हम सुनते हैं या जो हमें सुनाई देती है)

In other words

$\implies$Sound is a pressure wave which is created by a vibrating object. This vibrations set particles in the sur- rounding medium (typical air) in vibrational motion, thus transporting energy through the medium.

Answer 2

The Sound is wave produce by Vibration.