A. Input
B. Output
C. Both A and B
D. Processor
🧠 Explanation:
An input device, like a keyboard or mouse, is used to enter data into a computer, enabling user interaction with digital systems. These devices translate physical actions into digital signals, facilitating tasks like typing, navigating, or gaming. Keyboards input text, while mice control cursors, making them essential for computing. Other examples include scanners and microphones, each serving specific functions. Input devices are critical in bridging human actions with technology, driving productivity in education, work, and entertainment. Their design and functionality continue to evolve, enhancing user experience and accessibility in modern computing environments.