There is more rain in the forest. There is more oxygen in the forest. There is more sunlight in the forest. There is more competition in the forest.
I gave my students this multiple choice question: Nicole was studying different ecosystems. She compared the number of plants living in a forest to those in a desert. Which factor best explains why more plants may survive in a forest?

Only one answer is correct among these 4 choices:
- There is more rain in the forest.
- There is more oxygen in the forest.
- There is more sunlight in the forest.
- There is more competition in the forest.

Could you tell me which one is correct?

There is more rain in the forest.