Answer: The correct option is d.
Explanation:
Longitudinal wave: the particles vibrate parallel to the direction of the propagation of the wave. For example, sound wave. Sound wave consists of compression or rarefaction.
Transverse wave: the particles vibrate perpendicular to the direction of the propagation of the wave. For example, light wave.
In surface wave, the wave is neither transverse nor longitudinal. It travels in circular motion. The particles travel both parallel and perpendicular to the direction of the wave propagation.
Therefore, Particles in a surface wave move in an elliptical or circular motion.
