What part of the vehicle is responsible for absorbing bumps and maintaining ride comfort?

The suspension system is the component of a vehicle that is specifically designed to absorb shocks from bumps in the road and to maintain ride comfort for passengers. It consists of various components such as springs, shock absorbers, and linkages, which work together to provide stability and control. When a vehicle encounters irregularities in the road surface, the suspension system mitigates the impact of these bumps, preventing them from being transferred directly to the vehicle's frame and occupants. By doing so, it enhances the overall driving experience, contributing to smoother handling and greater comfort.

The other systems mentioned do not perform this function. The steering system primarily focuses on directing the vehicle, the braking system is related to slowing down or stopping the vehicle, and the exhaust system manages the vehicle's emissions without influencing ride comfort. Therefore, it is clear that the suspension system is the correct answer for maintaining ride comfort and absorbing road imperfections.