The congress shall have power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defence and general welfare of the united states; but all duties, imposts and excises shall be uniform throughout the united states.

what does the quoted text demonstrate about the powers of government?

a. all powers not given to the federal government are reserved for the states.

b. some powers in the united states are shared between state and federal governments.

c. if a power is not explicitly held by the federal government, it is reserved for the states or the people.

d. some powers are expressly given to the federal government under the constitution.

The answer is "D.Some powers are expressly given to the federal government under the Constitution."

 DELEGATED powers are particularly allowed to the national government in Article I, Section 8 of the Constitution. This incorporates the ability to coin cash, to manage business, to proclaim war, to raise and keep up military, and to set up a Post Office.  

IMPLIED POWERS are not particularly expressed in the Constitution, but rather might be construed from the flexible (or "essential and appropriate") statement (Article I, Section 8).  

INHERENT POWERS are not particularly recorded in the Constitution, but rather they develop out of the specific presence of the national government.

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.