Which part of the braking system should be examined to ensure safe operation?

The braking system is a critical component of vehicle safety, and a thorough examination helps ensure proper operation. The correct choice encompasses key elements of the braking system that must be inspected regularly. Brake pads are vital for creating the friction necessary to stop the vehicle, allowing for safe braking performance. The air compressor is essential for generating the air pressure required in air brake systems, which are common in larger vehicles. Furthermore, the air lines need to be checked to ensure there are no leaks or damage, as this can compromise the entire braking system's effectiveness.

In contrast, only examining brake lights does not provide any information about the actual braking performance of the vehicle. Focusing solely on brake drums would neglect other critical components that play significant roles in overall function. Lastly, while the steering pump is important for vehicle control, it does not relate directly to the braking system's operation. Thus, the choice that includes brake pads, the air compressor, and air lines is essential for ensuring the comprehensive safety and functionality of the braking system.