The correct answer is An operating system.An operating system (OS) is specialized software that controls and monitors how all other programs within the system are executed.It is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer.It provides an interface between a computer user and computer hardware.It is the system software that manages computer hardware and software resources and provides common services for computer programs.All computer programs, excluding firmware, require an operating system to function.Additional InformationOperating systems are found on many devices such as a computer, mobile phones, video games, etc.Software programIt is a set of instructions, or a set of modules or procedures, through which computer operation is performed.It is often called a software application and a software product.