A seat belt is a safety device found in vehicles that helps keep passengers secure while driving. It is made of strong fabric and is designed to hold you in place during sudden stops or accidents. Wearing a seat belt reduces the risk of injury by preventing you from being thrown around inside the car or ejected from it. When you buckle up, the seat belt works by distributing the force of a crash across your body. This is important because it helps protect vital areas like your head and chest. Always remember to fasten your seat belt before starting your journey, as it can save your life in emergencies.