Answer:
4
BIOS
Step-by-step explanation:
BIOS is short for Basic Input Output System. Its a built-in program a system utilize to power on after it is shut down. It also controls data flow between the operating system and other attached devices such as the hard drive, mouse etc. It is usually found on the motherboard of a system. BIOS manages the hard drives, it acts as an intermediary between the CPU and the I/O (input/output) devices.