What denotes a tire skid?

A tire skid is defined as a situation where the tire loses its grip on the road surface, resulting in sliding. When tires are skidding, they are not rotating as they normally would if they were maintaining contact with the road and providing adequate traction. Instead, they are sliding along the surface, which is precisely what choice B describes. This state can occur due to factors such as excessive speed, abrupt steering, or slippery road conditions, leading to a loss of control of the vehicle.

In contrast, the other choices describe scenarios that do not align with the characteristics of a tire skid. For example, when tires are rotating without moving forward, they are still in contact with the surface and could occur in situations like spinning tires on ice, but this does not constitute a skid in terms of loss of traction. Tires moving in a controlled manner indicates effective traction and control, contrary to the chaos associated with skidding. Lastly, tires bouncing off the surface typically refers to issues such as hitting bumps or potholes, which again is not related to the definition of a skid.