I would say it’s about using your life usefully. In other words, the summary is about “Making use of one’s life”.
Hope it helps!
It is a A. simple sentence, because there is only one main verb - opened.
A compound sentence has at least two independent clauses, a complex sentence has an independent clause and at least one dependent, a compound-complex clause sentence has two independent clauses and at least one dependent.
I would say roman numerals because they look more sophisticated, but I don't think it should matter.
Answer: <em>Here, the tone of the story shifts to one of acceptance and awe</em>