The answer is the top one because Jess is asking his mom a question.
Introducing Christianity into pagan communities was a long and difficult process because that societies had their own culture and religion that was usually very strong and vital. People don't change their beliefs and habits quickly, especially when they don't want the new ones. Introducing Christianity was always a decision of the leader (e.g. king) who wanted to strenghten his international position. Due to it, elements from old religion were combined with Christianity what made new religion more acceptable for the people.
The word you’re looking for is around.
Answer: The island setting forces the boys to let go of some of society's conventions.
Explanation:
The whole book is basically about how people will act without society's rules.