Final answer:
To park uphill with a curb, turn the front wheels away from the curb to prevent the vehicle from rolling into traffic.
Step-by-step explanation:
When parking your vehicle facing uphill with a curb, you should turn your front wheels away from the curb. This ensures that if your vehicle starts to roll, it will roll into the curb, which will help to stop the vehicle from running into traffic. The full sentence with the missing word filled in is: When parking your vehicle facing uphill with a curb, you should point your front wheels away from the curb.