❓ 题目 According to the passage, which of the following best explains why secondary succession typically occurs faster than primary succession?
- A. A) Secondary succession begins with lichens and mosses that rapidly break down rock.
- B. B) Secondary succession occurs in areas where soil and some biological remnants persist.
- C. C) Secondary succession involves a greater variety of pioneer species than primary succession.
- D. D) Secondary succession is driven by competition rather than facilitation.