At the end of the story,Haw found Cheese Station N where the greatest supply of cheese was .

 In fact,Haw was the main character of the whole story,what happened to him meant on word-changes:The change in Cheese Station C;The change of His thought from being scared to enjoying finding.

 Being mankind,Haw was good at thinking.He told the readers:We should notice when the little changes began so that we could be better prepared for the big change that might be coming.