What role do control arms play in a vehicle's suspension system?

Control arms are pivotal components in a vehicle's suspension system, and their primary function is to connect the chassis to the wheel assembly. This connection allows for the wheels to move up and down, accommodating changes in the road surface and load conditions while maintaining proper wheel alignment. By enabling independent movement of the wheel relative to the vehicle's body, control arms help to optimize ride quality, handling, and overall vehicle stability.

They play a crucial role in maintaining the correct geometry of the suspension system, which is essential for effective tire contact with the road. This ensures that handling characteristics are predictable and that tire wear is minimized. Control arms can be found in various designs, such as upper and lower control arms, each contributing to the suspension dynamics based on the vehicle's design.

The other options focus on different aspects of vehicle functionality. Connecting the battery to the electrical system is related to electrical components, engine performance pertains to powertrain dynamics, and supporting the steering system involves separate components such as tie rods and the steering rack. However, control arms uniquely serve the purpose of maintaining the connection between the body and wheel assembly, which is critical for suspension function.