What is the main purpose of a seatbelt on a bus?

Answer: A — To keep passengers in place during sudden stops or collisions

The primary purpose of a seatbelt on a bus is to keep passengers in place during sudden stops or collisions. In the event of an accident or an abrupt stop, seatbelts help to prevent passengers from being thrown forward or out of their seats, significantly reducing the risk of injury. This safety feature is essential in protecting the lives of passengers and ensuring they remain safely secured within the vehicle, especially in the event of a sudden impact. The other options suggest purposes that do not align with the actual function of seatbelts. For example, seatbelts are not designed for decoration or aesthetics; their sole focus is on safety. While they do help restrain passengers from moving around excessively, the primary concern is protecting passengers during sudden movements or accidents. Additionally, seatbelts do not contribute to reducing the weight of the bus, as their main function is rooted in health and safety rather than vehicle engineering.