Which of these factors helps increase visibility while riding a motorcycle at night?

Using high-beam headlights is a crucial factor in increasing visibility while riding a motorcycle at night. High-beam headlights illuminate a greater distance ahead and can make the motorcycle more noticeable to other drivers. This enhanced visibility is vital for both the safety of the motorcyclist and for alerting other road users to their presence. Bright lights can help identify obstacles, road conditions, and traffic signals, particularly in poorly lit areas, giving riders a better chance to react appropriately.

In contrast, wearing dark clothing does not help visibility; it can blend into the night, making it harder for other drivers to see the rider. Riding without any lights significantly decreases visibility, increasing the risk of accidents. While keeping a low speed may give a rider more time to react, it does not inherently increase visibility to others on the road. High-beam headlights are specifically designed to enhance visibility, making them the best choice for riding safely at night.