4. What are the different administrative units under federal system?​

The United States is composed of states, possessions, territories, and a federal district, each with varying numbers of subdivisions. The principal administrative division of a country might be called the “first-level (or first-order) administrative division “ or “first administrative level.”

Explanation:

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

the use of electrical signals that transit messages is know as