❓ Câu hỏi According to the passage, which of the following statements about keystone species is TRUE?
- A. A) Keystone species are always the most abundant organisms in their communities.
- B. B) The removal of a keystone species can lead to decreased biodiversity.
- C. C) Robert Paine's research focused on terrestrial ecosystems.
- D. D) The keystone species concept has been universally accepted without criticism.