Conflict because it just makes sense
The central idea is the central, unifying element of the story, which ties together all of the other elements of fiction used by the author to tell the story.
Post the picture next time please
The correct answer is "elevated style".
This is because all of the other options do not belong to a true epic, and fit more with a satire. A true epic is supposed to be serious and present a great deed by the main hero or the heroes.
The subject and verb don't agree, the revised sentence should be
"Sequoia and Charles plan to exercise together."