Sound is an example of A.longitudinal waveB.transverse waveC.a wave that can travel through a vacuumD.a...

Particle motion is always parallel to wave motion in longitudinal waves, which is how they are identified. For example, a sound wave travels from the lips of a speaker to the ear of a listener, where the particles of air vibrate to and fro in the same direction by transferring the energy. As a result, the sound is a prime illustration of a longitudinal wave.