lakes oceans rivers glaciers
I gave my students this multiple choice question: Humans cannot survive without clean, fresh water. Reservoirs of liquid water vary, but all water spends time as a gas in the atmosphere. What is the source of most of the water in the atmosphere?

Only one answer is correct among these 4 choices:
- lakes
- oceans
- rivers
- glaciers

Could you tell me which one is correct?

oceans