It is glaciation * if this helped you in anyway please be sure to leave a thanks:)
B- Water Cycle will be the answer.
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Convection currents are circular currents or movement within a
liquid due to different densities of the hotter and cooler parts.
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The answer is C. The Fertile Crescent
Hope i helped
The general flow of air from the the poles to the equator occurs in the stratosphere.
