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The image contains a three-stage diagram illustrating sand dune formation, with a key indicating symbols for wind (right-pointing arrow), sand particles (dotted circles), wet sand (solid curved shape), and dry sand (hatched area). In the first stage, wind moves across a flat surface of dry sand containing patches of wet sand, causing sand particles to accumulate on the wet patches. The second stage shows two small mounds of sand particles formed on the wet sand patches, with wind flowing over them. The third stage depicts these mounds growing into larger dunes on the wet sand bases, with wind continuing to transport particles over their crests and the intervening dry sand surface showing small ripples.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagrams compare three different ways of sand dunes are shaped including main features such as wind, sand particles, wet sand and dry sand.
Overall,every form of sand dunes are unique.There are noticeable differences in the direction of wind with straight, upward and downward.Other futures such as sand particles, wet and dry sand differ from each other for just quantity.
First way has formed by straight duration of wind, while in second upward and in third downward duration.However, third way held a clear advantage in sand particles which shows it is the most greatest way in this phenomenon with two wet sand which one of them bigger than second.In contrast, second picture taking the second beneficial way with a deferences of medium amount of sand particles which upward wind gathered and with same as third wet sand.Both third and second experienced success, but first picture demonstrated least useful way just with small amount of sand particles which contribute to unnoticeable sand dune than others.
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