What is the difference between law of blood & law of soil?

In north america, most winter storms form when cold, dry air from interacts with warm, moist air from

Does anyone know the answers for these

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.