If you mean which sentance best represents the moral of the story then it would be the second to last sentence: "At last a Wolf really did come, and the Boy cried, "Wolf! wolf!" as loud as he could: but the people were so used to hearing him call that they took no notice of his cries for help."
Answer: The complex sentence comtain a dependent clause.
Explanation: Because one of the rules of complex sentence is dependent, independent clause.
<span>The subject tells what the sentence is about; it contains the main noun or noun phrase. </span>