Which of the following components connects to the drag link?

The lower steering arm is the correct answer because it is the component that connects directly to the drag link in a vehicle's steering system. The drag link functions as a connector between the steering box and the steering arms, allowing for the transfer of motion as the driver turns the steering wheel.

The lower steering arm serves as a crucial point in this linkage, facilitating the movement of the wheels in response to steering inputs. When the drag link moves, it causes the lower steering arm to pivot, which directly influences the wheel alignment and turning radius of the vehicle, ensuring responsive handling and control.

Other components such as the upper steering arm, steering box, and air compressor have different roles within the vehicle's structure. The upper steering arm connects to the upper pivot points, while the steering box is responsible for converting the rotational motion of the steering wheel into the linear motion needed to turn the wheels. The air compressor, on the other hand, is part of the vehicle's air braking system and is not involved in steering components.