Final answer:
The best formation when riding in a group on motorcycles is the staggered formation, providing safety, space, and visibility for all riders.
Step-by-step explanation:
When riding in a group, the best formation is the staggered formation. This formation allows for a safe distance between motorcycles, providing each rider with enough space to maneuver and react to hazards.
The staggered formation is also efficient for visibility, as it gives each rider a clear view of the road ahead, and is recommended for groups traveling on open roads. Riding in a single-file is sometimes used in curves or under poor conditions, while the v-shaped and side-by-side formations are less common and can be unsafe in traffic.