Tundras are warmer than grasslands. Grasslands get more rain than deserts. Deserts have more plants than rainforests. Rainforests are rockier than tundras.
Which comparison of ecosystems is true?

Options:
- Tundras are warmer than grasslands.
- Grasslands get more rain than deserts.
- Deserts have more plants than rainforests.
- Rainforests are rockier than tundras.

Grasslands get more rain than deserts.