What type of vehicles must carry at least one fire extinguisher?

The correct answer indicates that limited passenger vehicles with authorized seating for more than 10 must carry at least one fire extinguisher due to safety regulations. This requirement is in place because larger passenger vehicles, which often transport more people, can pose a greater risk in the event of a fire. The presence of a fire extinguisher is a precautionary measure that can help mitigate damage and ensure the safety of all occupants in case of an emergency.

Larger vehicles, such as buses and other forms of public transport, frequently operate in environments that may pose a higher fire risk, especially with many passengers on board. Thus, having appropriate safety equipment, like a fire extinguisher, aligns with safety standards and regulations to protect the lives of passengers and drivers.

The other options either do not require fire extinguishers or the requirements for those vehicles differ based on their specific use or configuration. For example, private passenger vehicles, while encouraged to carry fire extinguishers for safety, are not mandated to do so under most regulations, unlike the larger vehicles specified in the correct option.