¿A qué tipo de contextos globales pertenecen los temas de las clases que escogiste para consignar? ¿Por qué?

Need now! 45 points laboratory: weather map interpretation i need someone to answer the other two questions. i will give to the best answer!

Which of the following terms describes the layers of air surrounding the earth ?

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.