What design approach adapts a website layout to different screen sizes?

• A. Responsive Design
• B. Mobile Device Compatibility
• C. Single Sign-On
• D. Proxy Server

Answer: (A)

Responsive design lets a website layout adapt to different screen sizes. It uses flexible grids, scalable images, and CSS media queries to rearrange and resize elements as the viewport width changes. This means the same site can look and function well on desktops, tablets, and smartphones because the layout reflows rather than requiring separate mobile or desktop pages. This approach keeps navigation and readability intact across devices and avoids the need for multiple versions of the site. The other options don’t fit because they refer to authentication (Single Sign-On), network routing (Proxy Server), or a vague notion of compatibility without describing how the layout actually adjusts to different screens.