Answer:
They don't want to assume that they support Jack in front of everyone, to avoid conflict.
Explanation:
Hello. You did not enter the text to which this question refers. However, I managed to find a question exactly like yours, where it showed that the question refers to "Lord of the Flies".
"Lord of the Flies" is a book that tells the story of a group of English boys who, after suffering an accident, are trapped on a desert island, without the supervision of any adult.
Among the boys, Ralph positions himself as a leader and tries to maintain the civilization and behavior of the boys while waiting to be rescued. However, the wild environment influences many of these boys to abandon civility and enter a complete state of savagery and violence. These boys are led by Jack, who stands as the antagonist, towards Ralf.
The biguns, who are the oldest boys, are divided between Ralkf's peaceful and civilized leadership and Jack's total savagery leadership, but are attracted by the way of life that Jack is offering, but trying not to create conflict and show infidelity to Ralf, they expect all the boys to be busy to support Jack, without anyone noticing.