Concept:Letters, journals, and diaries are personal records of real events, so they belong to factual writing.
Explanation:These forms record actual experiences, thoughts, or information about real people and real situations.
They are not invented stories, so they are not fiction.
Meta-fiction is fiction that comments on itself, so it does not apply here.
Faction mixes fact and imagination, but letters, journals, and diaries are generally based on truth.
Non-fiction is literature that deals with facts, real events, and real people, such as biographies, history, and personal accounts.
Therefore, letters, journals, and diaries are clear examples of non-fiction.
Answer:D. non-fiction