What can cause in aquaplaning (sliding on wet roads) on wet road surfaces?

You answered correctly. Aquaplaning, or hydroplaning, can happen on wet roads when water on the surface prevents the tyres from properly contacting the road. Driving at high speed increases the risk because tyres have less time to push water away. Worn tyres have shallow tread and can't disperse water well, making aquaplaning more likely. Grooves in the roadway can direct water into certain areas, increasing water accumulation, which can also cause loss of grip. Always reduce speed in wet conditions and make sure your tyres are in good condition to prevent aquaplaning.