B. pressurized liquids
A hydraulic system utilizes a compact liquid as its fluid, rather than compressible fumes. In this type of device, hydraulic fluid is communicated completely through the machine to several pressure-driven motors and hydraulic automobiles and becomes pressurized according to the resistance present.
Power steering liquid is the type of hydraulic liquid. Most are crystal oil or silicone dependent fluids, while some use automated transmission fluid, made from artificial base oil.