Which technology is often used to enhance user interactions on websites?

JavaScript is widely recognized as a key technology for enhancing user interactions on websites. It allows developers to create dynamic and interactive content, such as responsive user interfaces, real-time updates, animations, and event handling, which significantly improves the overall user experience. With JavaScript, website elements can respond to user actions, such as clicks, keystrokes, and mouse movements, providing immediate feedback and richer interactions.

Other technologies listed serve different purposes. Static HTML is used for creating the basic structure of web pages but does not provide interactivity. CSS is primarily focused on the presentation and layout of web pages, dictating how elements appear but lacking the capability to respond to user interactions. XML is a markup language designed for data storage and transport, not specifically meant for enhancing user interactions. Thus, JavaScript stands out as the technology most directly involved in enhancing user engagement on websites.