A. farmers per area of farmland.
B. people per area suitable for agriculture.
C. farm animals per area suitable for agriculture.
D. acres of farmland. people per area of land.
The physiographic density is the number of the pole per unit of land and suggested by the available agricultural units the land and represents the density of the population per unit of the lands as that of the united states is the 156 person per the unit of the lands. And is expressed as the per Km square.
