When driving down a steep hill, how should Stella adjust her car's gear?

When driving down a steep hill, adjusting the car's gear to a lower gear is crucial for maintaining control and managing speed. By shifting to a lower gear, the engine can help slow down the vehicle through engine braking. This method reduces reliance on the brakes alone, which can overheat and become less effective if used continuously on a steep incline.

Using a lower gear also ensures that the car stays at a safer speed, enabling the driver to react quickly to any obstacles or changes in traffic conditions. It's an important technique that enhances vehicle control and safety when descending hills, helping to prevent accidents caused by excessive speed.