GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 85ZN54TVW5JCI4T5J

According to the passage, which of the following is a true statement about the feeding behaviors of sea urchins A. They change according to the type of food available in an area. B. They are responsible for the decline of abalones in some regions. C. They have a significant impact on the young of another species. D. They make sea urchins more vulnerable to potential predators. E. They result in marked decline in certain regions.