The correct answer is Operating System. Operating System:Operating System (OS), is a program that manages a computers resources, especially the allocation of those resources among other programs. Typical resources include the central processing unit (CPU), computer memory, file storage, input/output (I/O) devices, and network connections. Management tasks include scheduling resource use to avoid conflicts and interference between programs. Unlike most programs, which complete a task and terminate, an operating system runs indefinitely and terminates only when the computer is turned off. Hence, the Operating System manages the execution of multiple applications using hardware resources.