Which of the following is an example of system software?

System software is a type of software designed to manage and operate the hardware components of a computer system, providing a platform for running application software. Windows OS, as the correct answer, serves as the primary interface between the user and the computer's hardware, managing resources such as memory, processing power, and peripheral devices. It enables the hardware to communicate effectively with application software and performs essential system tasks.

In contrast, Microsoft Word, Google Chrome, and Adobe Photoshop are examples of application software. These programs are designed to help users perform specific tasks, such as word processing, web browsing, or graphic design. They rely on the underlying system software, like the Windows OS, to function but do not manage hardware or system resources themselves. Thus, the distinction between system software and application software is key to understanding why Windows OS is the example of system software in this context.