What is the main purpose of a seatbelt?

The main purpose of a seatbelt is to reduce the risk of injury during an accident. When a vehicle is involved in a collision, the forces at play can cause passengers to be thrown forward or sideways. A well-fitted seatbelt secures the occupant in place, helping to prevent them from being ejected from the vehicle or colliding with the interior components of the car, such as the steering wheel, dashboard, or windows. This safety feature is critical because it greatly enhances the chances of survival and reduces the severity of injuries.

While other options may have some relevance to driving, they do not pertain to the primary function of a seatbelt. For instance, keeping the driver awake or preventing theft of the vehicle does not align with the fundamental safety and injury prevention goals of using a seatbelt. Ensuring passengers are seated correctly is also essential for overall safety, but it is secondary to the protective role that seatbelts play in an accident context.