Why is it important to inspect the mirrors?

Inspecting the mirrors during a pre-trip inspection is vital primarily because they provide the driver with the necessary visibility to monitor the surroundings of the vehicle. This visibility is crucial for safe driving maneuvers, such as changing lanes, merging, and backing up. Properly functioning mirrors enable the driver to make informed decisions by seeing other vehicles and obstacles that may be in their blind spots.

While checking for cracks or scratches and ensuring that mirrors are securely attached also contribute to their functionality, the main focus during inspections should always be on the ability to see clearly and accurately. A mirror that is damaged or poorly attached may compromise this visibility, highlighting the first option as the most critical reason for inspection. Enhancing aesthetic appeal is not a function of the mirror's primary role in safety, making that choice irrelevant for the purpose of the inspection.