Two placemarks are located in the white sands desert, one marking some parabolic dunes, and the other marking some barchanoid ridge dunes. the shape of these dunes can tell you the direction of the prevailing winds in that area. use the sketches below to you work through the following exercise.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.

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