Which most accurately explains why flat money differs from commodity money?

Flat money, or Fiat money, is currency that has no intrinsic value and is not backed by a physical commodity; its value is derived from government regulation and trust in the issuing authority. In contrast, commodity money has intrinsic value because it is made of or backed by a physical good, such as gold or silver, which has inherent worth. This fundamental difference means that flat money relies on the stability and creditworthiness of the government, while commodity money is tied to the value of the actual commodities it represents.