Explanation:

A peripheral device is an auxiliary device that connects to and works with a computer but is not an essential part of the core computer architecture. These devices extend the computer's capabilities. Examples include printers, scanners, keyboards, mice, and external hard drives. While a keyboard and printer are specific examples of peripherals, 'peripheral' is the general term for such external, non-essential hardware. An icon is a graphical representation on a screen. A bit is the smallest unit of digital data. Thus, 'peripheral' is the most accurate general term for hardware not crucial to basic function but connected externally.