❓ 質問 According to the passage, which of the following best illustrates the main idea regarding keystone species?
- A. A. The removal of a keystone species always leads to a collapse in species diversity.
- B. B. The keystone species concept is universally applicable and predictable across all ecosystems.
- C. C. The impact of a keystone species is not always consistent and may depend on environmental context.
- D. D. Keystone species are typically the most abundant organisms in their community.