Which component is responsible for increasing hydraulic pressure in a system?

The pump is the key component responsible for increasing hydraulic pressure in a hydraulic system. It converts mechanical energy into hydraulic energy by moving fluid and creating pressure. The operation of a pump is crucial, as it draws hydraulic fluid from a reservoir and forces it through the system, thereby generating the pressure necessary to perform work, such as moving actuators or lifting loads.

Other components like filters, accumulators, and reservoirs play essential roles in maintaining the hydraulic system but do not directly increase pressure. Filters keep the fluid clean, accumulators store energy by using hydraulic fluid under pressure, and reservoirs hold the hydraulic fluid. However, the actual process of increasing pressure within the system is solely the function of the pump, making it the correct choice in this context.