Tundras are warmer than grasslands. Grasslands get more rain than deserts. Deserts have more plants than rainforests. Rainforests are rockier than tundras.
I gave my students this multiple choice question: Which comparison of ecosystems is true?

Only one answer is correct among these 4 choices:
- Tundras are warmer than grasslands.
- Grasslands get more rain than deserts.
- Deserts have more plants than rainforests.
- Rainforests are rockier than tundras.

Could you tell me which one is correct?

Grasslands get more rain than deserts.