There may not be enough drinking water. There may not be enough water in the water cycle. There may not be enough oxygen for humans to breathe.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Sheri went on a field trip with her class and saw a stream with floating garbage. How could this pollution affect humans?
Possibilities:
- There may not be enough drinking water.
- There may not be enough water in the water cycle.
- There may not be enough oxygen for humans to breathe.

There may not be enough drinking water.