Which action is illegal when driving?

Driving without a seatbelt is illegal because it compromises your safety and increases the risk of injury in the event of a crash. Seatbelt laws are in place to protect drivers and passengers by ensuring they are secured in their seats, which significantly reduces the likelihood of ejection from the vehicle during an accident. Compliance with seatbelt use is mandatory in many jurisdictions, reflecting the emphasis on safety in traffic regulations.

In contrast, driving with a valid license, adhering to speed limits, and using headlights at night are all actions that are lawful and promote safe driving practices. A valid license indicates that the driver has passed necessary tests and is qualified to operate a vehicle. Driving within the speed limit is crucial for maintaining control of the vehicle and ensuring safety on the road, while using headlights at night is a basic legal requirement to enhance visibility and alert other drivers.