PLEASE HELP!! 5. Looking more like trees than hills, these hills result from limestone erosion, and the region where they are found is full of sinkholes, caverns, and caves...so be careful
a. The Persian Hills
b. The Karst Towers
c. The Korean Kapalua
d. The Himilaya Hills

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.