Answer:
point of view
Explanation:
none of the other choices make sense
It's a fragment because it needs a complete cause.
I believe the answer is "A".
The answer is D because this is Expository, meaning to entertain.
The introduction I would say because in your introduction you use a grabber which should grab the attention of your readers. But also maybe your first body paragraph... it all just kind of depends on how YOU want to structure your essay.