Question

Why is sound wave called a longitudinal wave?​

Answer 1

Sound waves in air are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.

Answer 2

$\huge\pink{Answer}$

A sound wave is called a longitudinal wave as it travels in a medium in the form of compressions and rarefactions where the particles if the medium vibrate in a direction which is parallel to the direction of propagation of the sound wave.