The correct response that illustrates the difference between the U.S. dollar (a form of fiat money) and a U.S. gold certificate (a representative currency) is:
A U.S. dollar does not represent a claim to some specific asset.
This statement highlights that the U.S. dollar does not have intrinsic value or a claim to a specific commodity (like gold), which is a characteristic of fiat money. In contrast, a gold certificate represents a claim to a specific amount of gold, indicating that it is a form of representative currency.