Cambridge English Dictionary defines "non-fiction" as "writing that is about real events and facts, rather than stories that have been invented."
A. When writing nonfiction, an author has far more freedom to move around from one setting to another.
Non-fiction writing thus offers more scope for experimentation with ideas and settings than fiction writing which is usually limited to a few themes in a piece of literary fiction. Non fiction writing can either be objective or subjective.
the answer is a
the answer to your question is the introduction, because the main text is the body paragraphs, and the table of contents is used to locate paragraphs, and the conclusion is where you wrap up all your thoughts in the end.