The most important measure of the size of a river is the
a. size of its watershed.
b. number of its tributaries.
c. volume of its discharge.
d. width of its mouth.

~Hello There! ^_^

Your question: The most important measure of the size of a river is the..?

Your  The most important measure of the size of a river is the volume of its discharge.

The answer is option C.

Happy Studying! =)

Tropical climate is experienced in the nothern countries of south america