Question

how do longitudinal wave particles move?
longitudinal waves move parallel to the direction the wave travels.
longitudinal waves move side to side.
longitudinal waves move in circular paths.

Explanation:

Longitudinal waves are characterized by particle motion parallel to the wave's direction of travel. This is a fundamental property of such waves. Side - to - side motion is more typical of transverse waves, and circular motion is not the defining characteristic of longitudinal waves.

Answer:

Longitudinal waves move parallel to the direction the wave travels.