Indian Ocean interior of Africa South Pole Tropic of Cancer
I gave my students this multiple choice question: Near Earth's equator, water generally exists naturally in the liquid and gas states. In which other part of Earth is water usually found naturally in only two states?

Only one answer is correct among these 4 choices:
- Indian Ocean
- interior of Africa
- South Pole
- Tropic of Cancer

Could you tell me which one is correct?

South Pole