Final answer:
Blind spots are areas around a vehicle that cannot be seen through mirrors alone and are critical to understand for safe driving.
Step-by-step explanation:
Areas around your vehicle which can't be seen in your mirrors are called blind spots. These are the areas where a motorist cannot directly observe other vehicles on the road through the mirrors alone. Understanding where these blind spots are and regularly checking them, such as by turning your head to look over your shoulder before changing lanes, is crucial for safe driving. This knowledge is fundamental to driver education and critical to preventing collisions on the road.