○ The diagram below shows the way in which sand dunes are formed. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The flowchart illustrates the process of making sand dunes in some deserts. And taking into account different types of sand and ground It is clear that sand dunes are formed with different wind directions. At first glance, wet ground does not move though it is obvious that it depends mainly on the direction and quantity […]