It is the main message or idea the author is trying to convey to the reader. The theme is the author's opinion of the subject.
Answer:
.
Explanation:
For part A its They were nomadic in their role as storytellers, and for part B it was "They told old myths as well as local news and happenings."
Answer:
Option B.
Explanation:
The medium of a story litteraly means "how the story is delivered", is it a play, a screen write, a poem, an short story etc etc.
In this case it's saying that the creators "animated people from the past", ergo the medium would be animation.
The others are talking about tone and authors voice, how the story is delivered metaphorically essentially
hope this helps :)