What device is responsible for displaying the processed text or graphics from a computer?

The monitor is the device responsible for displaying processed text and graphics from a computer. It acts as the primary output interface, allowing users to visually interact with the information and applications running on their system. Monitors come in various types, including LCD, LED, and OLED, providing various resolutions and color depth options to enhance the viewing experience.

In contrast, the printer is designed to produce physical copies of documents and images, while the speaker outputs audio signals, enabling sound production but not visual display. A scanner, on the other hand, is used to convert physical documents and images into digital format, allowing them to be processed and stored by the computer. Thus, the monitor's specific role as a visual display device makes it the correct answer.