Bakit mahalaga ang balagtasan bilang isa sa mga uri ng dulang patnigan?

Which agents contribute to erosion? sunlight. shorelines. moving water. ice and glaciers. humans and animals.

What is the mercury length of time for one revolution around the sun?

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.