What is the primary function of seat belts?

The primary function of seat belts is to reduce injury during an accident. When a vehicle is involved in a collision, the sudden stop can cause occupants to continue moving at the same speed as the vehicle was traveling. Seat belts secure the occupants in their seats, thereby minimizing the risk of ejection from the vehicle and preventing them from striking the interior parts of the car or being thrown into other passengers. This protective feature significantly reduces the severity of injuries, making seat belts a crucial safety device in vehicles.

While enhancing comfort or preventing movement might seem relevant, they are secondary considerations. The aesthetic aspect of a vehicle is not related to the seat belts' essential function, which is solely focused on passenger safety during an accident. Therefore, the correct response highlights the critical role seat belts play in protecting lives on the road.