pick from the following. a. air mass over Earth's surface. b. movements in the earth's crust. c. The bending of a ray of light. d. Movement of an air mass. e. pressure differences.. f. Physical weathering. g. looseness of dirt or compost. h. remains of prehistoric life.
Given those answer options, answer the question: Fact 1: Sand dunes are formed by the wind transporting and depositing sand. Fact 2: Winds are caused by pressure differences. Given the two facts above, sand dunes can be formed by?
A:
e.