Final answer:
A web browser is used to make HTTP requests from URLs and render the HTML document received, which involves additional processing of CSS and JavaScript.
Step-by-step explanation:
To make HTTP requests from URLs and render/display the HTML document received, a web browser is used. Web browsers are software applications designed to retrieve and present information on the World Wide Web. The process typically involves entering a URL into the browser’s address bar, which triggers the browser to send an HTTP request to the web server where the requested page is hosted. The server then responds with the HTML content, and the browser parses and renders it on the user’s screen. Additionally, the browser will also process CSS and JavaScript to provide the full user experience.