“Yet I see/ Thy honourable mettle may be wrought”
What details? You didn't provide a picture or anything.
Based on this synopsis, heroism is the likely theme used to develop Bilbo's character in The Hobbit.
The correct answer is becoming an astronomy researcher
For starters, it is the only appositive phrase. It is also non-essential because the sentence conveys full meaning even if it was removed.
True. There can be several Incidents that may be contained within the plot, but it doesn't define it.