Space is limited for growth. The quality of light is low. Soil must be created. Minerals are destroyed.
I gave my students this multiple choice question: After a volcanic eruption, it takes a long time for large ecosystems to fully recover. Which statement best explains why the development takes so long?

Only one answer is correct among these 4 choices:
- Space is limited for growth.
- The quality of light is low.
- Soil must be created.
- Minerals are destroyed.

Could you tell me which one is correct?

Soil must be created.