20
pg. 167
"Cole's heart pounded. Had he just seen the Spirit Bear? What else on the island could be that big and white? As he scrambled down the rocky slope, his thoughts raced. Did he dare not tell Edwin and Garvey he had seen the Spirit Bear?" I think Cole should tell Edwin and Garvey, because if Cole wants his words to speak louder than his actions, then this is a good way to achieve that goal. Even though Garvey and Edwin might not believe Cole he should at least give it a shot.

pg.169
caulking- (verb) to fill or close seams or crevices
Caulk
Caulk

curbly.com
http://dictionary.reference.com/browse/caulk?s=t

pg.174
Obligation-(noun)- Binding oneself by a social, legal, or moral tie

Page:170:Quizzically:{Adverb}In a questioning manner{Source:Google Dictionary}.

stock photo : 3d man heavy burden
stock photo : 3d man heavy burden

http://www.shutterstock.com/s/obligation/search.html