What does this have too do with English. Is it in a book but which one?
Explanation:
we wont know what book your talking about unless you tell us
Answer:
Hi!
The answer is <em>an astute observer</em>.
Explanation:
In chapter 10 part 1, we learn more about Pierre Aronnax, and most specifically, that he's an astute observer. This can be seen in many instances, one of them being when Pierre shares that his attitude about God and science is that everything begins with God as Creator.
I think you could pick both B and D in this situation. You didn't include the passage so I have nothing to go on here except my little knowledge of the story from when I read it.