What is the height of burj Khalifa​

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.

Which phrase describes the time it takes for a planet to make a complete rotation

Good scientists always report their observations and results truthfully. this is especially important when a scientist's results go against previous ideas or predictions. coming up with inventive ways to solve problems or produce new things