What can be inserted in the header or footer of a document?

The option regarding document properties is correct because headers and footers in a document are designed to provide consistent information that often includes document-related details. This can involve elements such as the title, author's name, date, or page numbers, which are considered document properties.

The placement of such information helps to maintain context and consistency across the pages of the document, especially in lengthy reports or formal documents where identifying details are important. These elements update and reflect across multiple pages, ensuring that the reader has access to critical information without needing to search for it within the body of the text.

Images, tables, and charts, while they can enhance the content of a document, are not typically used in headers and footers. They are more commonly found in the main body of the document where they can be integrated into the flow of content, rather than fixed in the header or footer, which is meant for repetitive information across the document.