What does CSS stand for?

CSS stands for Cascading Style Sheets. This term accurately describes the purpose and functionality of CSS in web development. CSS is a style sheet language used to describe the presentation and layout of a document written in HTML or XML. The term "cascading" refers to the way styles are applied in a hierarchical manner, allowing one set of styles to take precedence over another, depending on factors such as specificity and source order. This cascading effect provides developers with a powerful tool to create visually distinct and responsive designs across different devices and screen sizes. Each of the other options does not reflect the true nature or function of CSS, making them incorrect interpretations of what CSS stands for.