Water is a polar molecule. Water contains an oxygen atom. Water has a high surface tension. Water has a high specific heat.
I gave my students this multiple choice question: Water moves by capillary action through soil from moist areas to dry areas. Which property of water is most responsible for this capillary action?

Only one answer is correct among these 4 choices:
- Water is a polar molecule.
- Water contains an oxygen atom.
- Water has a high surface tension.
- Water has a high specific heat.

Could you tell me which one is correct?

Water has a high surface tension.