What does the term 'blind spot' refer to while driving?

The term 'blind spot' while driving refers to areas around your vehicle that are not visible through the mirrors and require the driver to look over their shoulder or turn their head to see. These blind spots can pose a significant risk, especially during lane changes or merges, as vehicles or obstacles in these areas may not be detected using just the rearview or side mirrors.

Understanding and checking blind spots is crucial for safe driving because they can hide other vehicles, bicycles, or pedestrians, leading to accidents if not properly checked. The other choices reflect different concepts related to visibility but do not accurately define the specific nature of blind spots as areas that are obstructed from direct view without turning the head.