In order to create a hydroelectric power plant, you need water, hence the prefix hydro-. Most times, people use dams to block the water, which in a way stores it. When you need to produce electricity, you release some of the water which flows through a turbine making it spin, which then activates a generator to produce electricity.
D is the Eurasian plate. It has Europe and part of Asia in it.
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Answer:
B remember when you take a rock from a river it's smooth
