Which of the following describes the function of CSS in web development?

The function of CSS (Cascading Style Sheets) in web development is to apply styling to HTML documents. CSS is specifically designed to control the presentation aspect of a web page, such as layout, colors, fonts, and overall visual design. By separating content (written in HTML) from design (defined in CSS), developers can achieve a more organized approach to web development. This separation also simplifies maintenance and enhances the ability to create responsive designs that adapt to various screen sizes.

CSS allows for precise control over how elements appear on the page, enabling developers to create visually appealing interfaces that improve user experience. The use of stylesheets also promotes consistency across web pages and simplifies changes; for example, adjustments can be made in one CSS file that automatically reflect across all pages linked to that stylesheet.

Other options, while related to web development, do not accurately describe the primary function of CSS. For instance, creating interactive elements is typically handled by JavaScript, structuring content falls under the purview of HTML, and managing server-side processes involves server-side languages and technologies, such as PHP or Node.js. Thus, the choice that describes CSS's function most accurately is that it is used to apply styling to HTML documents.