What techniques does the author of a memoir use to present facts? to present opinions?

To present facts, an author may describe actual people and their actions and behaviors.

And to present opinions, s/he uses his own commentaries and thoughts in the memoir.

Explanation:

Memoirs are literary works of non-fiction about an event/events presented or described from the author's perspectives. Presentation of facts and opinions differ greatly in memoirs and other form of writings.

Writers of memoirs use the description of actual people and the actions and behaviors of individuals to present facts in it. While for opinions, they use their own thoughts an commentaries, their own statement of belief about the event.

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