Answer:
functional region is an area organized to function politically, socially, and economically as a single unit. Functional regions are centered on a focal point that connects other areas by various systems, such as transportation, communication, or economic activities.
Oceans cities roads homes ecosystems
Census = the fourth answer
Demography = the first answer
Carrying Capacity = the third answer
Population Density = the second answer
Hope this helps!
I am not sure. If this is correct or not
