Answer: This quote best represents FEDERALISM.
Explanation: Federalism can be defined as the system of government in which the power and responsibilities of a country are shared between the state government and the Federal government.
This quote above best represents FEDERALISM as it states that the power of a nation not given to the federal government can be exercised by the state government.
For example, if the constitution does not state that the federal government has the duty to collect taxes, the states may exercise that power.