I would say that it depends on the audience. Personally, a debate regarding ethics and moral dilemma is interesting. Read The Fat Man and the Impending Doom. It's just one paragraph so it's not going to bore audience.
https://thedailydilemma.wordpress.com/2007/06/18/fat-man/
I believe that this type is a lecture-forum discussion.
First person point of view maybe, that is usually the style in which he wrote in but i don't know what story you are talking about.
Answer:
Dramatic irony.
Explanation:
If the author had made the reader aware of the gift that Jim had purchased at the beginning of the story, this would be an example of dramatic irony. Dramatic irony occurs when an audience has a deeper understanding of the events of the story than the characters. When this happens, the words and actions of the characters have a different meaning for the audience than for the characters. In this case, if the audience had known about Jim's decision, they would have known it was a bad one, while Jim continued to believe it was a good one.
The schoolhouse reveals that the story takes place in the distant past because it is the only one for all the island's students
Hope this helps!