Final answer:
The provision in the Constitution that is an enumerated power is 'a. the section in Article I specifying that Congress has the authority to coin money.' Enumerated powers explicitly stated within the Constitution provide the basis for federal authority in a variety of areas. There also exist implied and inherent powers.
Step-by-step explanation:
An enumerated power within the US Constitution is a power explicitly stated to be within the federal government's jurisdiction. The choices given in the question are all provisions within the Constitution, but the one that is an enumerated power is: 'a. the section in Article I specifying that Congress has the authority to coin money.' This authority of Congress is clearly provided for within the text of the Constitution.
Enumerated powers cover a wide range of areas and are set out mainly in Article I, Section 8. They include the power to coin money as well as regulate commerce, establish post offices, maintain a military, and declare war among others.
It's important to note that while there are many powers specifically enumerated in the Constitution, there are also a variety of powers that are implied, such as those interpreted from the 'necessary and proper' clause, and inherent powers which are accepted to exist simply due to the existence of a national government.
Learn more about Enumerated Powers