❓ 题目 According to paragraph, what was the main finding of Robert Paine's experiment with starfish?
- A. A. Removing starfish led to an increase in overall species diversity.
- B. B. The absence of starfish allowed mussels to dominate and reduce biodiversity.
- C. C. Starfish primarily preyed on mussels, keeping their population stable.
- D. D. Keystone species are always top predators in their ecosystems.