You are presented with the question "Deeper and wider rivers alter the constituents carried by what?" and the following answer choices: 
- rivers
 - atmosphere
 - mussels
 - clouds
 - salmon
 - moisture
 - water
 - Frogs.

Now knowing that erosion causes a river to become deeper and wider and erosion alters the constituents carried by water, choose the best answer.


 

       water  