How should a passenger behave when riding on a motorcycle?

Answer: B — Lean as you lean

The recommended behavior for a passenger when riding on a motorcycle is to lean as the rider leans. This alignment helps maintain balance and stability for both the rider and the passenger, particularly during turns and curves. When the passenger moves in sync with the rider, it reduces the risk of losing control of the motorcycle. If the passenger were to lean in the opposite direction or remain completely still, it could create an imbalance that might compromise safety. Additionally, holding onto the rider's shoulders can lead to an unstable grip and potential distractions; instead, the passenger should ideally use handholds designed for safety and stability.