What potential hazard is increased in wet conditions?

Answer: C — Loss of traction

In wet conditions, the potential hazard that is significantly increased is loss of traction. When the road is wet, the surface becomes slippery, and the friction between the motorcycle's tires and the pavement is diminished. This reduction in traction can lead to difficulties in controlling the motorcycle, particularly during acceleration, braking, and maneuvering. Riders may find it harder to stop safely or negotiate turns without their tires slipping or skidding. The other options, while relevant to different riding conditions, do not specifically align with the primary hazard associated with wet roads. Reduced visibility can be a concern, but it's not directly tied to traction loss. Increased wind resistance may occur in various situations but is not exacerbated specifically by wet conditions. Engine overheating is generally not related to moisture on the road and is more concerned with mechanical issues rather than external weather conditions.