Why must both brakes on a motorcycle always be in perfect working order?

You answered correctly. Both brakes on a motorcycle must always be in perfect working order because using both brakes ensures the shortest possible braking distance, which is essential for safe stops in emergencies. Additionally, if one brake fails, the other can still help slow down or stop the motorcycle, providing an important safety backup. These reasons cover both effective braking performance and the ability to respond if a technical failure occurs. This matches answers 1 and 2. Answer 3 is not required, because parking on a hill can be secured with the gearbox or a parking brake if available, but the main reason for both brakes working perfectly is safe riding and emergency preparedness. Remember, always ensure both brakes are functioning before riding your motorcycle.