Answer:
currency in circulation and reserves.
Explanation:
The Federal Reserve System ( popularly referred to as the 'Fed') was created by the Federal Reserve Act, passed by the U.S Congress on the 23rd of December, 1913. The Fed began operations in 1914 and just like all central banks, the Federal Reserve is a United States government agency.
Generally, it comprises of twelve (12) Federal Reserve Bank regionally across the United States of America.
The monetary liabilities of the Federal Reserve include currency in circulation and reserves. The currency in circulation includes all of the US paper currency (dollar bill) that are available in the country while reserves refers to the minimum deposits being held for the U.S Treasury and depository financial institutions by the Fed.
Additionally, the overall sum of the United States of America treasury monetary liabilities and the Federal Reserve System's monetary liabilities is generally referred to as the monetary base.