Answer:
Ralph says, in chapter 9, that the boys are going to Jack's tribe so they can have fun and act like children. He says the boys are leaving him so they can hunt, pretend to be a tribe, and put on war paint. Jack offers the boys excitement and lures them with food from his hunts.
The synonym that best describes a friendly competition is the word "Match: contest between two or more". Usually, the word "match" is used in sport games when a group of people or a team competes against each other to win a certain title. The word "battle" means war and already involves deadly weapons.
While our parents were working, Mrs. Kent watched <u>us.</u>
they or we, wouldn't make sense when you read the sentence.
Hope this helps.