Final answer:
The Federal Reserve System is the subject of this question. It is a crucial part of Social Studies as it regulates the supply and flow of money and credit to promote economic growth and stability.
Step-by-step explanation:
The subject of this question is Social Studies. The Federal Reserve System, which regulates the supply and flow of money and credit, falls under the domain of Social Studies. The Federal Reserve System was established in 1913 as the nation's central bank and it plays a crucial role in promoting economic growth and stability.