What must happen to pressurized fluid in a hydraulic or pneumatic system after it is transmitted to the point of use?

In hydraulic or pneumatic systems, the pressurized fluid is utilized to perform work, such as moving a cylinder or activating a motor. When that fluid reaches the point of use, it must indeed be converted back to mechanical power. This conversion allows the system to do work, such as lifting, pushing, or rotating components.

For instance, in a hydraulic cylinder, the pressurized fluid enters and creates force that moves the piston, resulting in linear motion. In pneumatic systems, compressed air might rotate a motor or push against a diaphragm to create motion or mechanical energy. The primary purpose of introducing pressurized fluid into the system is to harness and convert that energy into useful work.

The other options address possibilities that do not accurately represent the process involved in utilizing pressurized fluids. Storing it for later use, releasing it into the atmosphere, or recycling could be part of different systems or processes, but they do not reflect the immediate necessity of converting the fluid's energy into mechanical power at the point of use during operation.