The packet that a web browser sends to a web server to request web page data is called an HTTP GET packet. This is the main answer. When a user types a URL or clicks on a link, the web browser sends an HTTP GET request to the web server hosting the web page. This request includes information about the specific web page the user wants to access. The server then responds to the request by sending back the requested web page data, which the browser can then display to the user. HTTP stands for Hypertext Transfer Protocol, which is the protocol used for communication between web browsers and web servers. The GET method is one of the HTTP methods used to request data from a server. It is commonly used to retrieve web pages, images, or other resources from a web server. Other options such as HTML RELAY, HTTP XFER, and HTML SEND are not commonly used terms in the context of web browsers and web servers, so they are not the correct answer. In summary, the packet that a web browser sends to request web page data is called an HTTP GET packet.