Vocabulary is all about words. We identify key vocab when we are trying to identify a set of words to learn.
Anecdotes are stories from the past, a part of someone's personal experience which is why they have to be factual if they are to be truthful. They can usually be checked, so i would say the correct answer is D. They are the main source of information in cryptozoology, since the main source is actually folklore, not anecdotes.
Topic, audience, and purpose are the three factors that determine the formality of a discussion.
A discussion of a subject is a piece of writing or a lecture in which someone talks about it in detail. That discussion deals with a particular topic, and has a targeted audience. Furthermore, it has a specific purpose either to explain, describe, or interpret a topic you had researched about, or even to deal with a problem.
