<span>Sand dunes can encroach on human habitats. Sand dunes move through a few different means, all of them assisted by wind. One way that dunes can move is through saltation, where sand particles skip along the ground like a rock thrown across a pond might skip across the water's surface. When these skipping particles land, they may knock into other particles and cause them to skip as well. With slightly stronger winds, particles collide in mid-air, causing sheet flows. In a major dust storm, dunes may move tens of meters through such sheet flows. And like snow, sand avalanches, falling down the steep slopes of the dunes that face away from the winds, also moving the dunes forward.
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They were helping people learn a new language because it would help them and give them better opertunties to get work and understand people around them. This was very important for them because without learning a new language they could not speak to the people. I think it's very good they learned a new language
The answer to this would be C. The other two would not make sense or fit for the time period. Also c is true, just learned this in history too!
When a plant has been without water for a long time, the central vacuoles lose water, the cells lose shape, and the whole leaf wilts. Plants often store sugars, ions, some proteins and occasionally pigments inside the vacuole.
Answer:
C. Cliff Palace, the largest of the cliff dwellings built by the Ancestral Pueblo people.
Explanation:
W. M. Akers' "Cliff Dwellers" talks about the Mesa Verde cliff dwellings of the Native Americans. These structures, dwelling spaces carved into the sides of a mountain provide a great archaeological site, providing an insight into the life of the Ancestral Pueblo people.
The whole passage deals with the Cliff Palace and how it was the center of that civilization. This largest cliff dwelling place, built by the Ancestral Pueblo people, focuses on why they had to construct such dwellings, only accessible by rope climbing. The passage describes the probable reasons for such dwellings and how it must have been abandoned.
Thus, the correct answer is option C.
