Final answer:
When parking facing uphill with a curb on the right, the vehicle's wheels should be turned to the left to prevent it from rolling into traffic if the brakes fail.
Step-by-step explanation:
When parking a vehicle facing uphill with a curb on the right side, it's important to ensure that the vehicle does not roll into traffic should the brakes fail. This question pertains to correct vehicle parking procedures to prevent accidents and ensure safety. The correct action to take in this scenario is to turn the vehicle's wheels away from the curb. Therefore, the vehicle's wheels should be turned to the left (option b). This is known as the curb parking rule.
In detail, when you park facing uphill with a curb, turning the wheels to the left causes them to be directed away from the curb. If the vehicle's brakes were to fail, the car would roll backwards and the front wheels would come to rest against the curb, helping to stop the car from moving any further. This method is a safety precaution used to prevent the vehicle from rolling downhill into traffic, potentially causing accidents or injuries. It is part of the fundamental lessons in driver's education and is often included as a question on driving tests.