Answer: Fiat money
Step-by-step explanation:
The paper money that is used in the United States is the Federal Reserve Notes. It should be noted that the Federal Reserve Note is an example of a fist money.
Fiat money refers to a government-issued currency and it should be noted that this isn't backed by a commodity. Through fiat money, the central bank can control the economy. Majority of modern paper currencies, are fiat money. e.g dollar, pounds etc.