Concept:Input devices are hardware components used to enter data and instructions into a computer for processing.
Explanation:The primary job of an input device is to send data and instructions into the computer.
This data is stored in the computer's memory for processing and later use.
Examples include keyboards, mice, scanners, microphones, and digital cameras.
Options B, C, and D describe output or retrieval functions, which are not correct for input devices.
Answer:A. send data and instructions into the computer memory.