Final answer:
HTML is used for semantic markup to structure web content, allowing for the creation and formatting of various elements on a webpage. It does not function as a query language, a communication protocol, or provide encryption.
Step-by-step explanation:
The HTML (Hypertext Markup Language) offers semantic markup for structuring web content. As the foundational technology used by web browsers to render web pages, it provides the means to create and format sections, paragraphs, headings, links, and other content for display on the Internet. Created by Tim Berners-Lee, HTML is one of the three core technologies of the web, along with URI (Uniform Resource Identifier) and HTTP (Hypertext Transfer Protocol).
HTML does not serve as a query language for RDF graphs, a communication protocol for web servers, or provide encryption for web pages. Instead, its primary purpose is to provide a way to structure and present content on the web.