Question

a longitudinal wave moves energy that is dropdown with options parallel, perpendicular to the direction of the wave’s movement.

Explanation:

In a longitudinal wave, the particles of the medium vibrate in a direction that is parallel to the direction of the wave's propagation (movement). Transverse waves have vibrations perpendicular to the wave's movement. So for a longitudinal wave, the energy transfer direction (related to particle vibration direction) is parallel to the wave's movement.

Answer:

parallel