Which action is critical to control while riding over a slippery surface?

Coasting with your feet skimming the surface is a crucial action when riding over a slippery surface. This technique allows for greater stability and balance while reducing the risk of losing traction. By keeping your feet close to the ground, you enhance your ability to recover if you start to slip or slide. It also enables you to distribute your weight effectively, which is vital for maintaining control on a slippery surface.

Other options may lead to loss of control; for instance, maintaining a high speed can reduce your reaction time and increase the risk of an accident, while using both brakes simultaneously can cause the wheels to lock up, leading to a skid. Making sharp turns can further destabilize the motorcycle, increasing the likelihood of sliding. Therefore, coasting with your feet skimming the surface is the safest and most effective method for navigating slippery conditions.