Answer:
Ralph
he letting the fire signal go out
Step-by-step explanation:
This is from the book Lord of the Flies and the story is narrated about a group of boys who are stranded in an island all alone and how their various experiences get them to show their more brutal sides and some others like Ralph show their leaderships skills.
Therefore, the character who most represented civilization was Ralph and Jack's happiness in killing his first pig is ruined because he let the fire signal go out.
Jack killed a pig and he is excited but when the others discover he failed to keep their fire signal going and lost the chance to escape the island, they're enraged.