What does the HTML Web development "trifecta" consist of?

The HTML Web development "trifecta" consists of HTML5, CSS, and JavaScript. This trio is fundamental to modern web development. HTML5 provides the basic structure of web pages, allowing developers to create and organize content effectively. CSS (Cascading Style Sheets) is used to style that content, providing layouts, colors, fonts, and responsive design features which enhance the visual presentation of web applications. JavaScript is used to add interactivity and dynamic behavior to web pages, allowing for features like form validation, animations, and asynchronous data loading.

Together, these three technologies empower developers to create rich, responsive, and interactive web experiences. They are often referred to as the core building blocks of web development, making knowledge of all three essential for anyone looking to work in the field. The other options, while they represent important technologies in their respective contexts, do not constitute the foundational trifecta for HTML web development.