Regular maintenance helps in monitoring which of the following aspects of a truck?

Regular maintenance is essential for monitoring mechanical and safety issues of a truck because it ensures that all components are functioning properly and safely. This process includes checking the brakes, tires, engine, transmission, and other critical systems that are crucial for safe operation. By identifying and addressing potential mechanical problems before they escalate, maintenance reduces the risk of breakdowns and enhances the overall safety of the vehicle, protecting both the driver and others on the road.

While aspects like overall appearance, fuel consumption, and seating comfort may benefit indirectly from maintenance, they do not capture the primary focus and importance of regular check-ups, which is to ensure the operational integrity and safety of the vehicle. Safety and mechanical reliability are of utmost concern in truck driving, making them the key focus areas in maintenance routines.