What is the primary purpose of HTML in web development?

The primary purpose of HTML, which stands for Hypertext Markup Language, is to provide structure and layout instructions for web pages. HTML elements define the various components of a web page, such as headings, paragraphs, links, images, and other multimedia elements. This structure allows browsers to render the content visually for users, establishing the foundation for the information presented.

HTML acts as the skeleton of a web page, enabling developers to create a well-organized document that is readable both by browsers and search engines. While other technologies (like CSS and JavaScript) play roles in enhancing design and interactivity, HTML's main function is to outline the basic arrangement of content, making it essential in web development.

In contrast, enforcing security measures is the role of additional technologies and methods beyond just HTML. Managing database connections typically involves server-side scripting languages like PHP or Python, and user behavior analysis is conducted through analytics tools and scripts that run on top of HTML, rather than the markup language itself. Thus, option B stands out as the correct answer regarding HTML's foundational purpose in web development.