The ganges basin is the most heavily populated river basin in the world. what density (people per square kilometer) do human populations reach along the ganges? reset the map. select physical environment and choose physical features. next, select population and choose population density. use the transparency sliders as necessary. the ganges basin is the most heavily populated river basin in the world. what density (people per square kilometer) do human populations reach along the ganges? a. 101 to 250 b. 251 to 500 c. 501 to 1000 d. 1001 to 12,801 > 12,801