Simple because there not describing each and every step
Themes are developed by authors through the following ways: What happens - key events. Characters - character qualities, character actions and how characters respond to situations may all relate to theme. Character development - the ways characters change, and the lessons they learn indicate themes for the reader. The major theme in a literary work is the most significant idea the author is trying to convey. A theme can be anything from “Love and Friendship” to “Good versus Evil.” It's the underlying idea that connects the plot and characters with a deeper meaning.
Hope this helps!! :)
The third choice, because it does not state where the idea came from
