Water flowing over a steeper slope moves faster and causes more erosion.  Having read the above passage, choose the right answer to the following question (choices are slower or faster ):   Lana is watching two waterfalls. The first waterfall is very steep, and the other is just a slope. The waterfall which will have the least erosion at the bottom is the one with the water which falls slower or faster?
The answer to this question is:
slower