Which maintenance task is important for ensuring good brake function?

Replacing worn brake pads is critical for ensuring good brake function because the brake pads are the components that create friction against the brake rotors to slow down or stop the vehicle. As brake pads wear down, their effectiveness diminishes, which can lead to longer stopping distances, increased braking time, and even potential brake failure if they become too thin. Regular inspection and timely replacement of brake pads maintain optimal braking performance and ensure driver and passenger safety.

While the other tasks listed contribute to general vehicle maintenance and safety, they do not directly influence the braking system's efficiency in the way that replacing worn brake pads does. Tire pressure affects vehicle handling and fuel efficiency, cleaning headlights improves visibility at night, and rotating tires helps ensure even tire wear. However, these tasks do not specifically address the crucial function and performance of the braking system like the condition of the brake pads does.