Answer: This occurs where streams radiate outward from an isolated mountain peak. Most volcanic islands have this pattern.
Subsoil: This layer has normally less organic matter than the A horizon, so its colour is mainly derived from iron oxides. Iron oxides and clay minerals accumulate as a result of weathering. In a soil, where substances move down from the topsoil, this is the layer, where they accumulate.
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B a hurricane, because it’s a naturally occurring event
Armed conflict between the United States and the Soviet Union that led to the breakup of the Soviet Union.