Running water is better able to dissolve oxygen and nutrients than standing water, and also, running water in rivers is the major force of erosion on the surface of the earth. Given these facts, which body of water would be able to  dissolve oxygen and nutrients the best among the following options:
- NaCl
 - Lake
 - Puddle
 - Pond
 - rain
 - CO 2
 - River
 - sugar


 

       River  