river flooding glacier melting ocean evaporation plant transpiration
I gave my students this multiple choice question: The water cycle is important for recycling the water on Earth. Which of these is the source of most of the water vapor in Earth's atmosphere?

Only one answer is correct among these 4 choices:
- river flooding
- glacier melting
- ocean evaporation
- plant transpiration

Could you tell me which one is correct?

ocean evaporation