What is a webpage?

A webpage is indeed a document that is part of the World Wide Web. It is designed to be viewed in a web browser and is written in HTML (Hypertext Markup Language) or a similar markup language. Each webpage can contain various elements such as text, images, videos, and links to other webpages, allowing for a rich, interactive experience for users. A webpage typically has a specific URL (Uniform Resource Locator) that allows it to be accessed easily on the internet.

In contrast, the other choices do not accurately define a webpage. A web browser is a software application used to access and display webpages, while an online game is an interactive entertainment medium, and a group of websites does not capture the individual nature and function of what constitutes a webpage. Therefore, understanding the role of a webpage as an essential building block of the web is crucial for navigating and utilizing internet resources effectively.