A whale. (because of the weight, the fins, the fact that it sprayed salty water and the barnacles on the head)
This is an example of figurative language i think... don't quote me hope i helped
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the correct answer would be D. he tried different kinds of wood, coconut fiber, and even the hair because you see the word EVEN in between the AND and the THE, we'll the EVEN makes the sentence seem like the author is thinking that Edison really wants to succeed.
So D) is the correct answer.
Hope I helped.
All I know about that book is that it's set in small New England villages, so C would make sense but not 100% sure