The correct answer is Hard disk.A hard disk is a hardware component.It is a data storage device in computers.It is kept inside the cabinet and through it, a large amount of data is collected and stored.It is a secondary storage device.The speed of a hard disk is measured in Revolutions Per Minute.Hard disks are of different shapes and sizes which enables the user to select them appropriately.It was first introduced by IBM in 1956.In Hard disks, data is stored on their surfaces in concentric tracks.Hard disks are 3.5-inch, for desktop computers, and 2.5-inch, primarily for laptops. Additional InformationOperating SystemIt is a 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.Microsoft OfficeIt is a set of computer applications mainly used for business or office purposes. First introduced in 1990, Office software is made by the Microsoft Corporation.InternetThe Internet is a vast network that connects computers all over the world.Through the Internet, people can share information and communicate from anywhere with an Internet connection.