Which web technology is primarily used for creating dynamic web pages?

JavaScript is primarily used for creating dynamic web pages because it enables interactivity and the manipulation of content in response to user actions. It can be executed in the browser, allowing developers to update the web page content without needing to reload the entire page. This capability makes JavaScript essential for implementing features such as real-time form validation, interactive graphics, animations, and responsive user interfaces.

HTML (HyperText Markup Language) provides the structure and foundational content of web pages, enabling the layout and organization of elements, but it does not facilitate dynamic interactions on its own. CSS (Cascading Style Sheets) is used for styling and layout, determining how HTML elements look visually, but it does not add interactivity or dynamic content capabilities. XML (eXtensible Markup Language) is primarily designed for data storage and transport rather than for creating dynamic content directly on web pages.

Thus, JavaScript is the technology that effectively allows for the creation of dynamic, interactive experiences on the web, enabling developers to enhance user engagement through seamless and responsive features.