Which of the following is the primary role of safety seat belts?

The primary role of safety seat belts is to reduce movement during a crash. When a vehicle is involved in a sudden stop or collision, the force can propel occupants forward at high speeds. Seat belts are designed to restrain these movements, preventing passengers from being thrown around the vehicle or ejected out of it. They distribute the force of the crash across stronger parts of the body, such as the chest and pelvis, greatly reducing the risk of serious injury or death.

On the other hand, while comfort and entertainment in the vehicle are important, they are not related to the functionality of safety seat belts. Holding the steering wheel is a task primarily related to controlling the vehicle, and seat belts do not serve that purpose. Thus, the only correct answer reflects the crucial safety aspect of seat belts in minimizing injury during accidents.