It is heat, convection cells in the asthenosphere cause the movement of the crust.
Sediment pollution is the single most common source of pollution in U.S. waters. Approximately 30% is caused by natural erosion, and the remaining 70% is caused by human activity. ... Sediment pollution can have long-term impacts on aquatic insects, fish and other wildlife in affected waterways
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a biology respiration is a set of metabolic reactions and processes that take place with in the cells of organisms.
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Umm...I'm not sure if this is a question where there is MC but if not, the the answer would most likely be, "By actually doing then saying"
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