If the frequency of a wave is increased, its energy decreases fluctuates stays the same increases

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.

What factors influenced brazil's current and future economic strength?

Countries trade with each other because resources are not evenly distributed across the globe. true or false