Which device is classified as an input device?

A webcam is classified as an input device because it captures video and images and sends this data to a computer for processing or display. Input devices are designed to provide data and control signals to a computer, and a webcam serves this purpose by allowing users to interact with their computer through video conferencing, streaming, or capturing photos.

In contrast, printers, speakers, and monitors are categorized as output devices. Printers output hard copies of documents, speakers produce sound, and monitors display visual output from the computer. Therefore, the webcam stands out as the correct choice, as it enables the input of visual data.