Which of the following best describes an adverse condition that requires heightened awareness?

Heavy rain is an example of an adverse condition that significantly affects driving conditions, requiring heightened awareness from the driver. When rain is heavy, it reduces visibility and can cause slippery road surfaces, leading to an increased risk of accidents. Drivers need to be more alert to changes in road traction and the possibility of hydroplaning, as well as the behavior of other drivers who may not be as prepared for such conditions.

In contrast, clear and sunny weather, light traffic, and smooth road surfaces create more favorable driving conditions. These situations typically allow for easier control of the vehicle and better visibility, which does not necessitate the same level of heightened awareness as heavy rain.