"SNCC" played a major role in the sit-ins and freedom rides, a leading role in the 1963 March on Washington, Mississippi freedom summer, and the Mississippi freedom Democratic Party over the years . Hope I helped !
I believe the answer is: Formal region
Each formal region would be differentiated by their own unique government structure that separate each region with the other. Each border on the sides of each region would consist of some sort of boundaries ( could be natural or human made) that accepted by all regions as a legal separation between their jurisdiction.
I can't entirely see the picture.
The air is a major part of it and it blows it around
