❓ 题目 According to paragraph 2, what was a key finding of Robert Paine's experiment with starfish?
- A. Removing starfish increased species diversity in the intertidal zone.
- B. Starfish primarily fed on algae, allowing mussels to thrive.
- C. The absence of starfish caused mussels to dominate and reduce species diversity.
- D. Mussels were the keystone species in the intertidal ecosystem.