I believe:
Q1: option 1
Q2: option 2
Used in the names of hotels, newspapers, and other products to indicate superior quality
I would say that you conclude your speech, essay, etc. with your meaning. Prose is a very straightforward and formal form of writing, and most people speak in prose as well. I suggest you explain your meaning throughout your paper, and straightforwardly state your meaning in the conclusion so that there is no confusion.
I believe that the most fitting answer for this question would be the third answer, exposition. Expository writing is a type of writing that is used to instruct, inform, or otherwise explain something to its readers. It is centered around a single topic and uses a pattern or a few patterns. It is used often in technical writing. Hope this helps.