What is the term for a computer that stores and sends requested web pages and other files?

The appropriate term for a computer that stores and sends requested web pages and other files is "Server." A server is designed to respond to requests over a network, serving data such as web pages to clients that request this information via their web browsers. Servers handle multiple requests simultaneously and are typically optimized for performance and reliability.

In the context of web development, servers play a crucial role in hosting websites and serving their content to users. When a user enters a URL in their browser, the browser sends a request to the server hosting that website, which then processes the request and returns the appropriate files (like HTML, CSS, images, etc.) to be displayed to the user.

The other choices—client, host, and router—have different meanings in the context of web architecture. A client refers to the device used by a user to access the web services, a host is a general term for any device on a network that can provide services, and a router is a networking device that forwards data packets between computer networks.