The correct answer is the Loading operating system.BIOS is used for loading the operating system.BIOS (an acronym for Basic Input/Output System and also known as the System BIOS, ROM BIOS, BIOS ROM, or PC BIOS) is the firmware used to perform hardware initialization during the booting process (power-on startup)It is used to provide runtime services for operating systems and programsThe BIOS firmware comes pre-installed on a personal computer's system board, and it is the first software to run when powered on. It also manages data flow between the computer's operating system and attached devices such as the hard disk, video adapter, keyboard, mouse, and printer.Additional InformationAn Operating SystemIt is software that acts as an interface between computer hardware components and the user.Every computer system must have at least one operating system to run other programs. Applications like Browsers, MS Office, Notepad Games, etc., need some environment to run and perform their tasks.The OS helps you to communicate with the computer without knowing how to speak the computer's language. The user can't use any computer or mobile device without having an operating system.