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The basic components of a hydraulic system are integral for its operation, and the correct choice highlights these essential elements accurately. A hydraulic system primarily relies on fluid to transmit power, which makes the pump a fundamental component. The pump converts mechanical energy into hydraulic energy by moving the fluid through the system.

The actuator is another key component that translates the hydraulic energy back into mechanical energy, performing work such as lifting, pressing, or moving loads. The reservoir is critical for storing the hydraulic fluid, ensuring that there is a sufficient supply for the pump and the entire system. Control valves are necessary for directing the flow of hydraulic fluid to the actuators and for regulating pressure and flow, allowing for precise control of the system’s operation.

This combination of a pump, actuator, reservoir, and control valves is essential for any hydraulic system to function effectively, providing a reliable means of power transmission and control.