Final answer:
Internet Service Providers (ISPs) are responsible for delivering webpages to a user's computer when requested through a browser, providing necessary infrastructure and internet connectivity.
Step-by-step explanation:
The correct answer to the question is: a) ISP (Internet Service Provider). ISPs are responsible for delivering webpages to computers when they are requested through a browser. When you type a web address into a browser, your ISP routes your request to the correct web server. This process involves converting the URL you enter into an IP address, which is then used to connect your computer to the server where the website is hosted. ISPs provide the infrastructure and internet connectivity that allow you to browse the web, send emails, and conduct other online activities.
Tim Berners-Lee, the inventor of the World Wide Web, wrote the first proposal on a NeXT computer, and by 1990 he had created HTML, the language that formats web content. Early internet service providers like America Online connected users to the internet using standard phone lines, but eventually moved to faster broadband connections.