Final answer:
Every request or response in web communication includes a header with metadata and a body containing the data. The header directs how to process the data, while the body conveys the actual information or resources.
Step-by-step explanation:
Each request or response in the context of the HTML structure and web communication typically has two main things: a header and a body.
Request or Response Header
The header contains metadata about the request or response, which includes information such as the content type, status code for responses, content length, and other HTTP headers. Each of these provides instruction or information about how to handle the incoming data.
Request or Response Body
The body of the request or response carries the actual data that is being transmitted. In the case of a request, this could include form data or uploaded files. For a response, it often contains the HTML page, image, or other resources being retrieved.