Which of the following HTML elements defines the structure of the webpage?

The element is responsible for defining the main structure of a webpage, as it contains all the content that will be displayed to users in the browser. This includes text, images, links, and other interactive elements that make up the visible part of a web page.

While

,

, and

are all important components that help organize and semantically structure the content within the body, they are not responsible for defining the overall structure of the webpage. Instead, they serve specific roles: the

typically holds introductory content or navigational links, the

contains information about the document, such as copyright details, and the

defines a self-contained piece of content within a page. Each of these elements enhances the organization and meaning of the content, but the element encompasses them all and is fundamental in establishing the webpage's overall structure.