Plant respiration will increase. Animals will be forced to migrate. Soil nutrients will be enriched. Natural succession will cease.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: How will a thriving grassland ecosystem most likely be affected by a drought?
Possibilities:
- Plant respiration will increase.
- Animals will be forced to migrate.
- Soil nutrients will be enriched.
- Natural succession will cease.

Animals will be forced to migrate.