The term federalism is best defined as
(1) the process of amending a constitution
(2) the power of the courts to determine the
constitutionality of laws
(3) a republican form of government with no
hereditary ruler
(4) the division of power between the states and
the national government
Federalism is the concept of power division: between the central government and the local governments that have some autonomy over their local matters. For example, in the US marriage equality used to be decided on a state level.
The correct answer is: (4) the division of power between the states and the national government
