Answer:
The Constitution
Step-by-step explanation:
The delegated powers are those powers specifically granted to the U.S. federal government in Article 1, Section 8 of the United States Constitution. Therefore, the source of these powers is the Constitution.
In this section, the Constitution grants Congress the power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defense and general welfare of the nation, to borrow money, to regulate international and interstate commerce, to coin money, to establish post offices and post roads, to provide and to maintain a navy, among others.