Ball joints are used to connect the steering knuckle to the __________.control armsframepitman armwheel bearings

The correct answer is "control arms."

Explanation:

Ball joints are vital components in a vehicle's suspension system, serving as pivotal connections that allow for rotational movement. Specifically, they link the steering knuckle to the control arms, which are components of the vehicle's chassis. The control arms are responsible for connecting the wheel hub to the car's frame, enabling the wheels to move up and down while maintaining the vehicle's stability.

By using ball joints, vehicles can achieve a balance between steering control and suspension flexibility. This allows for smoother handling and improved ride comfort as the suspension reacts to road irregularities. Proper functioning of the ball joints is crucial for vehicle safety, as worn or damaged ball joints can lead to poor steering response and increased tire wear, potentially resulting in an accident.