TOEFL Reading: ETS-TOEFL阅读机经 - 7U3S7U5W3Z51DN0SL$

According to paragraph 1, why is the ability to glide considered useful to forest-dwelling species? A. Because gliding removes the need to travel long distances in search of food. B. Because gliding serves as a rapid, energy efficient way of descending from trees. C. Because gliding gives them an advantage of moving through the forest without being exposes to predators in the ground. D. Because gliding makes them possible to adapt to various forests conditions.