Hello! I am happy to help.
The answer to this question would be D -- wind erosion. This is because wind can blow against the force of gravity.
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A change over time because of the government
The Volga is the longest river in Europe. It is also Europe's largest river in terms of discharge and drainage basin. The river flows through central Russia and into the Caspian Sea, and is widely regarded as the national river of Russia.
Answer: I am pretty sure that it is A
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Explanation: