Ariver’s is the sediment and other deposits picked up as a result of abrasion.
a. slope
c. flow
b. volume
d. load

The answer is D. The sediments like rocks, sand, and silt eroded by a river is known as a "load". As the river flows, these material goes with the river. Large particles are washed along the river bed while the finer particles float in the river.

This country likely has a high total fertility rate (tfr).