What is the main purpose of using CSS in web design?

The main purpose of using CSS (Cascading Style Sheets) in web design is to style the appearance of web pages. CSS allows designers to separate the presentation of content from its structure, enabling greater flexibility and control over layout, colors, fonts, spacing, and overall visual aesthetics. By applying CSS, web designers can create consistent styling across multiple pages, enhancing the user experience and ensuring that the website is visually appealing.

Using CSS, designers can implement responsive design techniques, which adapt the presentation of web content to different screen sizes and devices, helping to ensure that a website looks good regardless of how it is accessed. This capability is essential in modern web design, where users access websites from various devices, including desktops, tablets, and smartphones.

In contrast, options related to adding interactivity, structuring content, or managing database connections address other aspects of web development. While interactivity is typically handled through JavaScript, the organization of content is primarily the function of HTML (HyperText Markup Language), and database connections are managed by server-side programming languages and frameworks, making CSS unique in its role focused on styling.