Answer the following question: Fact 1: Sand dunes are formed by the wind transporting and depositing sand. Fact 2: Wind erosion is the movement and deposition of soil particles by wind. Given the two facts above, what can be caused by wind erosion?

Select from:
(1). Water expanding
(2). Pollution
(3). Sand dunes
(4). an object
(5). deforestation
(6). flooding
(7). patch reefs
(8). detritus
Answer:
(3).