What is the irony of the fire in lord of the flies chapter 12

During the beginning of the book, the fire was two things: it was a way to signal for a rescue, and it was a tool to cook food and keep them warm. In both cases, it was a marker of civilization. However, by Chapter 12, things have reversed. Fire is now a sign of savagery, as the boys are trying to burn Ralph out.

question:  

the chart compares religious beliefs to us political party support.

religious beliefs and party support, 2012

this chart demonstrates that

a) more highly religious people supported the republican candidate, while more nonreligious people supported the democratic candidate.

b) more highly religious people supported the democratic candidate, while more nonreligious people supported the republican candidate.

c) more moderately religious people supported the republican candidate, while more nonreligious people supported the democratic candidate.

d) more moderately religious people supported the democratic candidate, while more nonreligious people supported the republican candidate.

answer: a.