Which action enhances visibility while riding?

Using the motorcycle's headlight significantly enhances visibility while riding. This action is crucial because it illuminates the road ahead, making any obstacles, vehicles, or road conditions more visible to the rider. Additionally, having the headlight on helps other drivers see the motorcycle, which is particularly important in low-light conditions or inclement weather. Riding with the headlight on during the day can also increase the motorcycle's visibility to other motorists, thus improving safety overall.

Wearing dark clothing decreases visibility, making it harder for others to see the rider, especially in poor lighting conditions. Riding at night without lights is highly dangerous as it severely limits visibility and makes it nearly impossible to see or be seen on the road. Adhering to the speed limit is important for safety but does not directly enhance visibility; visibility relies more on being seen and being able to see clearly while riding.