Which component connects hydraulic system components?

The hydraulic line is essential for connecting the various components of a hydraulic system. It functions as the pathway through which hydraulic fluid is transmitted between components, such as the master cylinder, brake calipers, and hydraulic actuators. The design of hydraulic lines ensures that they can withstand high pressure and prevent fluid leaks, which is critical for the efficient operation of hydraulic systems.

While the brake hose is also important in a hydraulic braking system as a flexible line, it is specifically designed to connect parts that experience movement, such as between the vehicle body and brake components. The caliper and metering valve serve specific roles in the braking process but do not primarily function as connectors for the hydraulic system. Thus, the hydraulic line is the correct answer, as it is the fundamental component that facilitates the transfer of hydraulic fluid throughout the system.