What does “balding” of tires generally refer to?

Answer: B — Absence of tread depth

Balding of tires generally refers to the condition where the tread has worn down significantly, leading to an absence of adequate tread depth. This is a critical issue for vehicle safety because tires rely on tread to provide traction, especially during wet or slippery conditions. When tires become bald, their ability to grip the road diminishes, which can result in longer stopping distances, increased risk of hydroplaning, and overall reduced performance in terms of handling and stability. It's essential for drivers to regularly inspect their tires to ensure there is sufficient tread depth for safe operation on the road.