What is the purpose of a seat belt?

The purpose of a seat belt is primarily to protect you during a collision. Seat belts are designed to secure occupants in their seats, which significantly reduces the risk of injury in the event of a crash. They work by spreading the forces experienced during a collision over a larger area of the body and preventing the occupants from being thrown against the interior of the vehicle or ejected from the car.

This protective function is a critical safety feature in vehicles, as studies have shown that seat belts save lives and reduce the severity of injuries. Effective use of a seat belt can prevent severe impacts, such as hitting the steering wheel, windshield, or side windows, which can lead to traumatic injuries.

The other options, while they could be seen as having some relevance in different contexts, do not capture the primary safety role of a seat belt. For example, keeping warm is not a function of a seat belt, and it has no aesthetic purpose or role in seat adjustment either. Hence, understanding the key function of a seat belt as a safety device is essential for promoting safe driving practices.