Which document could include supplementary materials like photos or videos?

Reports are designed to convey detailed information and analysis on specific topics, often incorporating data and supplementary materials to enhance understanding. Supplementary materials, such as photos, videos, and charts, can be included in reports to provide visual context, exemplify data, or illustrate findings. This makes reports a suitable format for incorporating a range of media that supports the written content.

In contrast, business letters, templates, and memos typically focus on direct communication and concise information sharing. Business letters usually adhere to a formal structure and aim to convey a specific message, while templates provide standardized formats for various documents without additional media elements. Memos are brief and often used for internal communication, prioritizing clear and straightforward information distribution over the inclusion of supplementary materials. Therefore, reports stand out as the most appropriate document type for including supplementary materials.