transpiration and precipitation precipitation and evaporation evaporation and condensation condensation and transpiration
I gave my students this multiple choice question: The ocean's surface is a more varied environment than its depths. Which two water-cycle processes cause the most variation in the ocean's surface salt concentration?

Only one answer is correct among these 4 choices:
- transpiration and precipitation
- precipitation and evaporation
- evaporation and condensation
- condensation and transpiration

Could you tell me which one is correct?

precipitation and evaporation