Final answer:
The computer monitors in your classroom are output devices. They display information to the user in the form of text, graphics, and videos.
Therefore, the correct answer is: option 'output devices'
Step-by-step explanation:
Computer monitors are output devices that display visual information using pixels. Monitors operate by lighting up pixels in red, green, and blue colors to create the full spectrum of colors on the screen.
Unlike some newer touchscreen monitors, which can also act as input devices, traditional monitors do not receive data from the user, they only display data.
The device that made it possible for digital computers to efficiently process large amounts of information is the hard drive. A hard drive allows for the storage and retrieval of digital information, making it crucial for the operation of modern computers. Pictured with a metallic component highlighted in a red circle, it is the primary data storage hardware in a computer.