Answer:
Federalism is the system of government which guarantees each state representation at the national level, the union of these entities is called federation.
Step-by-step explanation:
Ok, Federalism is the type of government that is composed of a group of different small local governments. They at the same type are independent and establish a union to represent all of them to foreign powers. The union sets rules, norms, laws, and codes that every small state has to follow and that are conceived by their agreement. However, they possess the same amount of power and their governments can't establish something in other small estates. While the federal government can settle something in the smaller states because they integrated it to rule them.