Which technique enables responsive styling by applying rules based on viewport width or other media features?

Which technique enables responsive styling by applying rules based on viewport width or other media features?

• A. Responsive Rules
• B. Viewport Hooks
• C. Adaptive Styles
• D. Media Queries

Answer: (D)

Media queries are the tool that lets you apply CSS rules only when certain conditions about the viewport or other media features are met. This lets a page adapt its styling as the screen size changes, enabling true responsive design. You can target specific widths, heights, orientations, or even color preferences, and put rules inside an @media block that activate only under those conditions. For example, @media (max-width: 600px) { ... } applies those styles only on narrow screens, allowing the layout to reorganize for smaller devices. The approach is about conditional styling based on the device’s characteristics, which is exactly what responsive styling requires. Other terms proposed don’t correspond to the actual CSS mechanism used to implement this behavior.

Media queries are the tool that lets you apply CSS rules only when certain conditions about the viewport or other media features are met. This lets a page adapt its styling as the screen size changes, enabling true responsive design. You can target specific widths, heights, orientations, or even color preferences, and put rules inside an @media block that activate only under those conditions. For example, @media (max-width: 600px) { ... } applies those styles only on narrow screens, allowing the layout to reorganize for smaller devices. The approach is about conditional styling based on the device’s characteristics, which is exactly what responsive styling requires. Other terms proposed don’t correspond to the actual CSS mechanism used to implement this behavior.