What does CSS stand for in web development?

CSS stands for Cascading Style Sheets in web development. It is a style sheet language used to describe the presentation of a document written in HTML or XML. The term "cascading" refers to the way styles are applied and how conflicts between styles are resolved, allowing for a structured hierarchy of styles. This system enables web developers to separate content from design, making it easier to maintain and update without altering the underlying HTML. This separation also enhances the flexibility of the web design, allowing for responsive and adaptive layouts across various devices and screen sizes.

The other options do not accurately represent what CSS stands for in the context of web development.