Why can't a sound wave be a transverse wave?

Answer 1

Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. Through solids, however, it can be transmitted as both longitudinal waves and transverse waves.

(Taken from wikipedia)

Answer 2

Sound waves are longitudinal waves because the particles in the medium move parallel to the direction of the wave propagation. In a transverse wave, particles move perpendicular to the direction of wave propagation, which is not the case with sound waves.