Which of the following actions should be avoided on slippery surfaces?

When driving on slippery surfaces, hard braking should be avoided because it can lead to a loss of traction and control of the vehicle. Slippery conditions, such as those caused by rain, ice, or snow, reduce the grip of the tires on the road. When a driver applies the brakes abruptly and forcefully, it can cause the wheels to lock up, leading to skidding. This situation can greatly increase the risk of an accident since the driver may be unable to steer the vehicle effectively while skidding.

In contrast, slow and gradual movements, the use of low gears, and gentle acceleration are methods that enhance control in slippery conditions. By maintaining a gradual approach, drivers can help ensure that their vehicle remains stable, reducing the risk of losing control.