Which surface should a motorcyclist avoid for better traction?

Answer: C — Gravel

Gravel surfaces present a significant challenge for traction because they can be loose and unstable. When a motorcycle rides over gravel, the tires can lose grip due to the shifting nature of the small stones, which may cause the bike to slide or even tip over. In contrast, paved roads offer a solid and stable surface that enhances traction and stability for motorcyclists, while firm dirt and even wet grass, although slippery, still provide better traction than loose gravel. Understanding different road surfaces and their impacts on motorcycle handling is crucial for safe riding practices, especially in varying weather conditions or terrains.