A dual-mass flywheel is used to __________.

A dual-mass flywheel is designed specifically to reduce vibration in a vehicle's drivetrain. The mechanism consists of two masses connected by a set of springs, which helps to isolate and dampen the torsional vibrations created by the engine's operation. This isolation allows for smoother power delivery to the transmission and ultimately to the wheels, enhancing overall driving comfort and reducing the strain on other components, such as the clutch and transmission mounts.

While the flywheel also supports the clutch assembly and plays a role in transferring power, its primary function is to mitigate vibrations which can contribute to noise and mechanical wear in the system. The other options, while relevant to the overall function of a vehicle's drivetrain, do not specifically capture the unique role of the dual-mass flywheel as effectively as the reduction of vibration does.