Seat belts are safety devices found in vehicles designed to secure passengers and reduce the risk of injury during a crash. They work by distributing the force of a collision across stronger parts of the body, such as the chest and pelvis, helping to prevent ejection from the vehicle. Wearing a seat belt is not only a safety measure but also a legal requirement in many places. Proper use involves placing the belt across the lap and over the shoulder, ensuring it fits snugly. This simple action can significantly increase the chances of survival and reduce the severity of injuries in an accident.