Final answer:
When parking a vehicle facing downhill, it is important to turn the wheels towards the curb and engage the parking brake to prevent rolling.
Step-by-step explanation:
When parking a vehicle facing downhill, it is important to take into account the force of gravity and the impact it has on the vehicle.
Gravity has a downhill component that can cause the vehicle to roll if not properly parked.
To prevent this, it is recommended to turn the wheels of the vehicle towards the curb or edge of the road, and engage the parking brake. This will provide additional stability and prevent the vehicle from rolling downhill.