Which part of a document serves to clarify or supplement information presented in the text body?

The appendix serves as a vital component of a document, designed specifically to clarify or supplement information found in the main text body. It typically contains additional details that support the document's content without interrupting the flow of the primary narrative. This may include data tables, detailed explanations, or supplementary materials that provide deeper context for the reader. By allowing the main text to remain focused and concise, the appendix enhances the overall understanding of the document while ensuring that the reader has access to further information if needed.

In contrast, the glossary defines specialized terms or jargon used within the document, providing quick reference for the reader but not necessarily supplementing or clarifying the information in the text itself. Report supplements may include additional sections or documents that can provide extra information, though they do not function in the same integrated way as an appendix. Headings serve primarily to organize content and guide the reader through the structure of the document rather than adding clarification or supplementary detail.