Which of the following is NOT part of the three layers of a web page?

The correct choice indicates that Java is not part of the traditional three layers of a web page structure, which include HTML, CSS, and JavaScript.

HTML (HyperText Markup Language) is the foundational layer that defines the structure and content of a web page. It outlines elements such as headings, paragraphs, links, and images.

CSS (Cascading Style Sheets) is used for the presentation layer of a web page. It styles the HTML elements by defining aspects such as layout, colors, fonts, and overall visual appearance, thus enhancing the user experience.

JavaScript serves as the interactive layer that allows for dynamic content and functionality on a web page. It enables features like form validation, interactive maps, and animations, making the web experience richer and more engaging.

Java, on the other hand, is a programming language that is generally not used for client-side web development in the context of web pages. Instead, it is commonly used for server-side applications or in environments such as Android app development. Hence, it does not belong to the core structure of a web page like the other three do.