It's to disagree with a person's opinion in a story, biography, or a narrated story.
Well, that was fun to answer!
I would say C. he wants to discover and understand things, causing the motivation in his scientific urges.
A formal tone would take place in the first box (top left) and the bottom box. An informal tone for example, would be in the top right box. You can find out how to analyze these by reading them aloud. Do they sound formal as if you’re in a meeting with a business? Or do they sound like you’re just sitting in your home and talking normally?
Yes, to see if all your own research like the data, calculation, hypothesis, etc. matches the other persons research like the person next to you or from a study or statistics from a few years ago