Answer: The correct answer is longitudinal wave.
Step-by-step explanation:
Longitudinal wave: The vibration of the particle is parallel to the direction of the propagation of the wave.
Longitudinal wave consists of the compression and the rarefaction.
Compression is the region where the density of the particles are more. Rarefaction is the region where the density of the particles are less.
The example of the longitudinal wave is Sound wave.