Which of the following is an example of an output device?

A monitor is an output device because it displays visual information generated by a computer. It converts digital signals from the computer into images, allowing users to view text, graphics, and videos. Monitors come in various forms, including CRT (cathode-ray tube) and LCD (liquid crystal display), and are essential for user interaction with software and applications.

In contrast, a scanner is considered an input device because it captures physical documents and converts them into a digital format for processing by a computer. A mouse is also an input device, serving as a pointing tool that allows users to interact with the graphical user interface of a computer. Similarly, a keyboard is an input device used for typing and entering data into the system. These devices facilitate inputting information into the computer rather than outputting information for the user to see or hear.