How does the operation of a hydraulic system differ from a pneumatic system?

The operation of a hydraulic system is fundamentally different from that of a pneumatic system due to the mediums they use for power transmission. Hydraulic systems utilize liquids, typically oil or water, to transmit force and motion. This allows for higher power density and the capability to operate under higher pressures, making hydraulic systems suitable for tasks that require significant force and precision.

In contrast, pneumatic systems employ gases, most commonly air, as their working medium. While they can be effective for certain applications, gases are compressible and less efficient for intense force applications when compared to incompressible liquids used in hydraulics. The differences in the mediums lead to variations in performance characteristics, such as responsiveness, efficiency, and the types of applications each system is best suited for.

This fundamental distinction is crucial for understanding the advantages and limitations of each system in practical applications, hence why the correct answer identifies that hydraulic systems use liquids for power transmission while pneumatic systems utilize gases.