TOEFL Reading: ETS-TOEFL阅读机经 - O6A9D31579BFSS1YL$

According to paragraph 4, which of the following statements is true of the relationship between ice-age Beringian animals and their environment? A. When present in sufficient quantities, lichens and mosses provide enough nutrients to satisfy the needs of herds of large mammals. B. The anatomy of certain animals present in that environment provides information about the intensity of winds there at that time. C. The structure of the teeth of most ice-age fauna indicates that they preyed on animals such as the mammoth, horse, and bison. D. Horses and bison are large enough that their feet can easily penetrate deep snow and uncover areas where they can feed on plant material.