Which action should be avoided when descending a steep hill?

When descending a steep hill, riding the brake continuously should be avoided because it can lead to brake overheating, resulting in reduced braking effectiveness. Continuous braking generates excessive heat in the brake components, which can cause brake fade, where the brakes lose their ability to slow down the vehicle properly. Effective descent on steep grades involves using a combination of low gearing and engine braking to maintain control of the vehicle's speed. This method reduces the reliance on the brake system and helps prevent overheating, ensuring safer operation. Shifting to a lower gear and utilizing engine braking are both critical techniques that help manage speed without stressing the brake system, while maintaining a safe speed is essential for overall safety during the descent.