What technology is primarily used to make a website dynamic?

The technology that primarily makes a website dynamic is client-side scripting like JavaScript. This scripting language enables developers to create interactive features on web pages, such as form validation, animated graphics, and responsive design elements that adapt to user input. By utilizing JavaScript, web developers can respond to user actions without needing to reload the page, enhancing user experience significantly.

While static HTML pages offer a foundational structure for websites, they do not provide the interactivity or dynamic capabilities that script-driven solutions do. Server-side stylesheets are primarily concerned with presentation and styling, lacking the processing power to respond to user interaction or change content dynamically. Additionally, images and videos, while integral to a rich web experience, do not themselves introduce dynamic functionality. Therefore, client-side scripting is crucial for any web application that seeks to offer a responsive and engaging environment for users.