Biodiversity would decrease, and sustainability would decrease. Biodiversity would decrease, and sustainability would increase. Biodiversity would increase, and sustainability would increase. Biodiversity would increase, and sustainability would decrease.
I gave my students this multiple choice question: Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the most likely outcome for the ecosystem?

Only one answer is correct among these 4 choices:
- Biodiversity would decrease, and sustainability would decrease.
- Biodiversity would decrease, and sustainability would increase.
- Biodiversity would increase, and sustainability would increase.
- Biodiversity would increase, and sustainability would decrease.

Could you tell me which one is correct?

Biodiversity would decrease, and sustainability would decrease.