Which of the following is an example of an operating system?

The correct answer is Windows because it is a widely recognized operating system that manages computer hardware and software resources while providing services for computer programs. An operating system serves as an intermediary between users and the computer hardware, facilitating the execution of applications and managing tasks such as file management, memory management, and system security.

In contrast, HTML is a markup language used for creating web pages, not an operating system. Java and Python are programming languages used for software development, allowing developers to write applications that can run on various platforms. While these languages can interact with operating systems like Windows to perform tasks, they do not themselves perform the functions of an operating system.