Let's think step by step! What can better dissolve nutrients and oxygen?
Options:
- (A) lakes
- (B) SO2
- (C) Raft
- (D) a solute
- (E) puddles
- (F) rivers
- (G) currents
- (H) lochs
The thinking starts now:
Running water is better able to dissolve oxygen and nutrients than standing water. Large, warm rivers hold populations but few occur in cold running water. Rivers can better dissolve oxygen and nutrients than lakes. The final answer: (F).