What is a requirement when carrying a passenger on a motorcycle?

When carrying a passenger on a motorcycle, one crucial requirement is that the motorcycle must have a seat large enough to accommodate two riders. This ensures that both the operator and the passenger have adequate space for safe seating, which is fundamental for maintaining balance and control of the motorcycle while in motion. A properly sized seat enhances comfort and reduces the risk of the passenger being thrown off balance, contributing to overall safety.

Additional safety features, such as footrests, are also important when carrying a passenger, as they provide a secure place for the passenger's feet, but the primary requirement pertains to the size of the seat. Other options listed may not address essential safety standards or practical aspects of carrying a passenger.