Why does fast-moving water lead to greater erosion than slow-moving water?

A.
It has more energy.

B.
It usually flows in a straight line.

C.
It evaporates faster.

D.
The particles it carries are smaller.

Question

Why does fast-moving water lead to greater erosion than slow-moving water?	
 
 A.
It has more energy.
 
 B.
It usually flows in a straight line.
 
 C.
It evaporates faster.
 
 D.
The particles it carries are smaller.

amistre64 · Answer

how do we define "greater" erosion?  at what point do we draw the boundary between greater and lesser?  If slow moving water carves out a canyon that is 1000 feet deep, and fast moving water carves out a canyon that is 1000 feet deep, which one has lead to greater erosion?