Which of the following is considered a safety device on the vehicle?

The parking brake is considered a safety device on the vehicle because it is specifically designed to keep the vehicle stationary when it is parked, preventing it from rolling away and potentially causing accidents or injuries. It is crucial for maintaining control over the vehicle when it is not in operation. Proper use of the parking brake is essential in various situations, such as when parked on an incline or when conducting maintenance; it ensures that the vehicle remains secure.

The steering wheel, while essential for vehicle operation, is primarily a control mechanism and does not have the specific safety function of the parking brake. The dashboard serves as an information center for the driver, providing critical data about the vehicle's performance, while the fuel gauge simply indicates the level of fuel in the tank, making it important for operational readiness but not for safety in the same way that the parking brake does.