During a pre-trip inspection, which of the following components must be checked?

The correct answer includes tires, brakes, lights, and fluid levels because these components are critical for ensuring the safe operation of the vehicle. During a pre-trip inspection, it is essential to check the condition of the tires to ensure they are properly inflated and have sufficient tread. Inadequate tire condition can lead to blowouts or loss of traction.

Brakes are vital for stopping the vehicle safely, and checking them for wear and proper function is crucial. Any issues with brake performance can lead to dangerous driving situations.

The lights serve important functions for visibility and communication with other road users. Ensuring all lights are functioning helps prevent accidents and ensures compliance with traffic laws.

Fluid levels, including oil, coolant, and brake fluid, are essential for the engine and overall vehicle functionality. Insufficient fluid levels can lead to engine overheating or brake failure, significantly increasing the risk of an accident.

In contrast, components like the air conditioning system and entertainment system, while they contribute to comfort and convenience, do not directly impact safety during vehicle operation and are not priority items during a pre-trip inspection. Windshield wipers are important for visibility, but the answer focused on the components that are universally critical for safe driving.