Which element is often found at the end of a document?

The appendix is often found at the end of a document because it serves as a supplementary section that provides additional information that is relevant to the main text but is too lengthy or detailed to include in the main body. This section can contain data, charts, graphs, or any other relevant material that enhances the reader’s understanding of the topic discussed.

Placing the appendix at the end allows readers to refer to it as needed without interrupting the flow of the main content, making it a convenient resource for in-depth study. In contrast, a conclusion summarizes the document's main points, while an introduction prepares the reader for what to expect. The body contains the main arguments or narratives, which are presented before the additional supportive content found in the appendix.