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

A monitor serves as a primary output device because its main function is to display information processed by the computer. When a computer executes tasks or runs applications, the results—such as interface designs, video content, and visual data—are sent to the monitor, allowing users to visually interpret the information. Output devices like monitors translate data from the computer into a format understandable to users, making them essential for interaction with the system.

While other choices like the keyboard and mouse serve input functions, and the scanner serves as a means to input physical documents into a digital format, these do not fulfill the role of conveying information from the computer to the user. Thus, the monitor distinctly aligns with the definition of an output device, as it specifically outputs visual data for user consumption.