A seatbelt is a safety device found in vehicles, designed to secure passengers and reduce the risk of injury during a crash. It typically consists of a strap that goes across the body and a buckle that keeps it in place. Seatbelts work by distributing the force of a collision across stronger parts of the body, helping to prevent ejection from the vehicle. Wearing a seatbelt is a legal requirement in many places, as it significantly increases the chances of survival in an accident. The use of seatbelts is promoted by various organizations, including the National Highway Traffic Safety Administration and the World Health Organization, to enhance road safety and protect lives.