When parking facing downhill, what should you do with your wheels?

When parking facing downhill, turning the wheels toward the curb is the correct action to take. This method uses the curb as a barrier to help prevent the vehicle from rolling into the street if the parking brake fails or is not engaged properly. Positioning the wheels in this way ensures that if the vehicle were to roll, it would come to a stop against the curb, minimizing the risk of an accident.

This technique is part of safe parking practices and demonstrates an understanding of vehicle control and safety in various scenarios. The other options would not provide the same level of safety; leaving the wheels straight or turning them away from the curb could allow the vehicle to roll into traffic, while turning them to the left (which is generally not applicable when parking on the right side of the street) could similarly lead to dangerous outcomes if the vehicle rolls.