What is meant by 'black ice'?

The correct choice refers to 'black ice' as a thin layer of ice that is see-through. This particular type of ice can form when temperatures drop, especially when rain falls on cold pavement or when moist air freezes on road surfaces. It can be deceptive because it blends in with the color of the asphalt, making it nearly invisible to drivers.

Recognizing black ice is crucial for safe driving because it can create hazardous conditions without warning. Drivers may not realize they are on a slippery surface until they encounter loss of traction, leading to accidents. Understanding that black ice is a thin, transparent layer helps drivers be more cautious, particularly in freezing conditions or after previous precipitation.