Which of the following components allows interaction between computer operators and the system?

Input/Output Devices are essential for facilitating interaction between computer operators and the system. These devices, such as keyboards, mice, monitors, and printers, allow users to input data into the computer and receive output from it. For instance, a keyboard enables the operator to enter commands or text, while a monitor displays the processed information. This two-way communication is critical for effectively using a computer system, making input/output devices the pivotal components in enabling user interaction.

Other components mentioned—like the motherboard, power supply, and storage disk—serve different functions. The motherboard acts as the main circuit board that connects all hardware components, the power supply provides electrical power, and the storage disk is used for data storage but does not facilitate direct interaction between users and the system. Hence, the role of input/output devices is uniquely focused on enabling user engagement with the computer functions.