Final answer:
The steering stops are used to limit the turning angle of the steering knuckle.
Step-by-step explanation:
The correct answer is d) Steering Stops.
Steering stops are used to limit the turning angle of the steering knuckle. They are physical components that prevent the wheels from turning too far, which can cause damage to the steering system or result in the wheels hitting other parts of the vehicle.
Drag links, steering arms, and universal joints are all part of the steering system, but they do not specifically limit the turning angle of the steering knuckle.