how does the diagram contribute to the central idea of paragraph 3? A.it shows how a weak layer of snow over a hard layer of snow can cause an avalanche. B.it provides evidence that avalanches are a serious danger to people who live, work, and play in snowy mountainous areas. C.it reveals how the structure of an avalanche can signal civil engineers to use dynamite to remove rhe rist. D.it illustrates how layers of strong and weak snow can affect the likelihood of an avalanche.
