Which two devices are considered input devices?

Input devices are hardware components that allow users to enter data and control signals into a computer system. The correct choice includes devices that serve this primary function.

A digital camera is an input device because it captures images and converts them into a format that can be processed and stored on a computer. A biometric authentication device, such as a fingerprint scanner or facial recognition system, is also an input device as it collects unique user data to allow access or verify identity. Both of these devices facilitate the entry of information into a computer, which is the defining characteristic of input devices.

In contrast, the other options contain devices primarily designed for output or visualization. A keyboard is indeed an input device, but a monitor is not; it displays information. A printer prints information onto paper, serving as an output device, while speakers produce sound. A mouse is an input device, but a projector displays images to an audience, also considered an output device.