TOEFL Listening: TPO-TOEFL阅读TPO - CHW1595DZ4JZJB1ZN$

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incurred choices change the meaning in important ways or leave out essential information. A. Ecologists now think that the stability of an environment is a result of diversity rather than patchiness. B. Patchy environments that vary from place to place do not often have high species diversity. C. Uniform environments cannot be climax communities because they do not support as many types of organisms as patchy environments. D. A patchy environment is thought to increase stability because it is able to support a wide variety of organisms.