Which device is most important for controlling a vehicle during a skid?

The steering wheel is the most crucial device for controlling a vehicle during a skid because it allows the driver to direct the vehicle's intended path. When a vehicle starts to skid, maintaining control is essential to regain traction and steer the vehicle back onto the intended course. By turning the steering wheel in the direction you want to go, you help align the front wheels with the skidding motion, which can help stabilize the car and prevent it from spinning out of control.

Effective use of the steering wheel during a skid also involves techniques such as counter-steering, where the driver turns the wheel in the opposite direction of the skid initially to regain traction. This response helps correct the vehicle's angle and can assist in recovering control as the tires regain their grip on the road surface.

Other options, such as the brake pedal or accelerator, can complicate the situation during a skid. Applying brakes can worsen the skid by locking the wheels, while accelerating can cause the vehicle to spin out further. The horn is not relevant in this scenario as it does not influence vehicle control or stability. Thus, understanding the role of the steering wheel is fundamental for effective vehicle control during a skid.