Answer: As per listed below:
Explanation:
"Progressive Enhancement"
The technique that places code conforming to older standards before newer properties, providing support for old browsers but still allowing newer standards and techniques to be used by the browsers that support them, is called "progressive enhancement".
Progressive enhancement is a design strategy that involves building web pages with a basic, functional structure using widely supported technologies and then adding more advanced features and styling using newer technologies that are supported by modern browsers. By layering these enhancements on top of a solid foundation of basic functionality, web designers can ensure that their pages are accessible and usable by the widest possible range of users, including those with older browsers or devices that may not support the latest web technologies.
One common implementation of progressive enhancement is to use a technique called "feature detection", where the website checks whether a certain feature is supported by the user's browser before using it. If the feature is not supported, the website falls back to a simpler, more basic version of the page that still provides the core functionality. This allows the website to provide a consistent user experience across a wide range of devices and browsers, while still taking advantage of the latest web technologies where they are available.