Which language is used to create style sheets for website design?

Cascading Style Sheets (CSS) is the language specifically designed for defining the presentation and layout of web pages. It enables developers to control the look and feel of websites, including details such as fonts, colors, spacing, and the arrangement of elements on the page. CSS allows for separation of content (which is usually handled by HTML) from design, giving developers greater control over the user interface and improving the maintainability of web applications.

In contrast, JavaScript is primarily a programming language used for creating dynamic and interactive functionality on the web. HTML (HyperText Markup Language) is the foundational markup language for creating the structure of web pages, but it does not include presentation details. SQL (Structured Query Language) is a language for managing and querying databases, which is unrelated to web design or styling. Therefore, CSS stands out as the correct choice for creating style sheets in web development.