❓ 题目 According to the passage, what is a primary reason why human activities can reduce ecological resilience?
- A. A. They increase the frequency of natural disturbances such as fires and floods.
- B. B. They simplify ecosystems and eliminate species that provide functional redundancy.
- C. C. They force ecosystems to shift toward a single, equilibrium-based stable state.
- D. D. They cause ecosystems to become more dynamic and less predictable over time.