Implementation Styles For CSS

CSS stands for Cascading Style Sheet. It is a style sheet language used for describing the presentation of a document written in HTML. CSS is responsible for the visual appearance of a webpage, including layout, colors, fonts, and other design aspects. The term "cascading" refers to the ability of CSS to apply multiple style rules to an HTML element, with the most specific rule taking precedence. By using CSS, web developers can separate the content and structure of a webpage from its presentation, making it easier to maintain and update the website's design.

The correct answer is "in-line, header, external". In-line implementation style refers to the code that is written directly within the HTML document. Header implementation style involves linking an external CSS file to the HTML document. External implementation style means that the CSS code is written in a separate file and linked to the HTML document.