All of the above is the answer
The Relative Clause is “who are five in number”. It is a type of dependant clause (it need the main clause in order to convey its meaning properly) that has the same function of an adjective; that is to say, it modifies a noun “friends”.
She uses pronouns i and me. instead of the name. you can tell also by the train of thought that is conveyed.
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nonfiction is content (sometimes, in the form of a story) whose creator, in good faith, assumes responsibility for the truth or accuracy of the events, people, or information presented. In contrast, a story whose creator explicitly leaves open if and how the work refers to reality is usually classified as fiction. Nonfiction, which may be presented either objectively or subjectively, is traditionally one of the two main divisions of narratives (and, specifically, prose writing), the other traditional division being fiction, which contrasts with nonfiction by dealing in information, events, and characters expected to be partly or largely imaginary.
Nonfiction's specific factual assertions and descriptions may or may not be accurate, and can give either a true or a false account of the subject in question. However, authors of such accounts genuinely believe or claim them to be truthful at the time of their composition or, them to a convinced audience as historically or empirically factual. Reporting the beliefs of others in a nonfiction format is not necessarily an endorsement of the ultimate veracity of those beliefs, it is simply saying it is true that people believe them (for such topics as mythology). Nonfiction can also be written about fiction, typically known as literary criticism, giving information and analysis on these other works. Nonfiction need not necessarily be written text, since pictures and film can also purport to present a factual account of a subject.
