The correct option is SYMBOL. A symbol refers to an object or character which is used as a conventional representation of an object, process or function. Symbol is a thing which stands for another thing. In the question given, the flag stands for United States of America.
The central idea revolves around that question. Is 16 too young to drive a car? It presents evidence, facts, and arguments to make the point of either 16 isn't too young or 16 is too young.<span />
