What does CSS stand for in web development?

CSS stands for Cascading Style Sheets, which is a fundamental technology used in web development. It is responsible for controlling the presentation, formatting, and layout of HTML documents. By using CSS, developers can separate content from design, allowing for greater flexibility and consistency across web pages.

Cascading refers to the way styles can be applied in a hierarchy, where styles can be inherited from parent elements to child elements, and multiple style sources can be combined with defined priorities. This cascading nature allows for an organized approach to styling web pages, enabling developers to create visually appealing and responsive designs.

The other options, while they may sound plausible, do not represent the meaning of CSS in web development. CSS's role in enhancing the aesthetic and layout of websites is pivotal in building user-friendly and engaging web applications. Understanding this concept is crucial for anyone involved in web design and development.