The correct description of the type of wave seen in this scenario is:
transverse, because the water molecules move up and down, which is perpendicular to the motion of the wave.
In this case, when a pebble is dropped into a pond, the ripples that spread out from the point of impact are transverse waves. The water molecules move up and down while the wave itself travels outward in a circular pattern, indicating that their motion is perpendicular to the direction of the wave's propagation.