Answer:
lending money to existing and new businesses
Step-by-step explanation:
Aside from helping individuals manage their money, the most significant contribution banks make to the U.S. economy is "lending money to existing and new businesses."
By lending money to existing and new businesses, the bank contributes to the United States economy, as they serve as a source of getting capital to finance or run businesses. Such actions help the companies to gather other forms of production factors such as materials and labor. With the access to money from the banks, both new and existing businesses can grow and expand, thereby reducing unemployment, increasing the standard of living, increasing the country's GDP, etc.