Question

which wave type involves particles moving parallel to the direction of motion? 1 surface wave 2 longitudinal wave 3 transverse wave 4 electromagnetic wave

Explanation:

Longitudinal waves are defined by particles oscillating parallel to the wave's direction of propagation. Surface waves have particles moving in circular/elliptical paths, transverse waves have particles moving perpendicular to wave motion, and electromagnetic waves are transverse (oscillating electric/magnetic fields perpendicular to travel direction).

Answer:

1. Longitudinal wave