This site will help you with that.
http://www.sparknotes.com/lit/flies/
CHAPTER 7
(#1)- When the boar charges, what does ralph do?
(#2)-What part does civilization play in dictating a need for good grooming?
2 answers
In a civilization people care about what they look like and how good their hygene is. On the boy's island their civilization didn't require you to look good or smell good. Mostly because they were a bunch of "Savages". In a civilization you try to impress others out of a normal happenstance.