Under what conditions might a stream's volume increase, and under what conditions might it decrease? how would the size of the sediment particles in the stream's load differ in the two situations?

Iwould say a is accurate

So since the snail is moving at 3.6  miles per hour you multiply by 5280 to change it into feet per hour. so you get 36*528 ft per hour. since there are 3600 seconds in an hour, you divide 36*528 by 3600. so simplifying we get 528/100 which is 5.28 ft per second