In belgium, citizens in constitutionally-protected regions elect separate governments to control public policies, as well as a single national government that controls other policies, such as trade and national defense. what does this constitutional arrangement most clearly represent?

Federal system

Explanation:

A federal system of government exercises a division between three types of government: national, state, and local. Under this principle, known as federalism, every single level of government is sovereign in some areas and shares authority in other areas. A clear example of this is the shared authority of federal and state governments, both of which can levy taxes.

there is an explationation of this on a site called crash   course world history 1

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.