Letters, journals and diaries are examples of

Step 1: Analyze the question The question asks which category of literature letters, journals and diaries belong to.

Step 2: Explain the concept Literature is broadly divided into:

• Fiction: imaginary, invented stories (novels, short stories).
• Non-fiction: writing based on real facts, events, and personal experiences (biographies, autobiographies, essays, letters, journals, diaries, speeches).
• Faction: a blend of fact and fiction, such as a historical novel based on real events but with invented characters or dialogue.
• Meta-fiction: fiction that draws attention to its own fictional nature (a story that "knows" it is a story).

Step 3: Apply to the options

• Letters, journals and diaries record real thoughts, events and experiences of real people, usually in the first person. They are factual personal records.
• A: Faction mixes fact and fiction. That is not what these forms are in general.
• B: Meta-fiction is a narrative technique, not a category for these forms.
• C: Fiction is invented, so it does not fit.
• D: Non-fiction fits, since these are real, factual records.

Step 4: Answer The correct option is D. non-fiction.

Tip: Think of "real life, real record" for non-fiction. Remember that in a novel, letters or diaries can be used as a technique (an epistolary novel such as The Color Purple), but letters, journals and diaries as a general category are non-fiction.