1) Water is stored behind the reservoir. Gravity pulls the water throw the opening in the dam, called the penstock, which has a turbine at its end. The water turns the propellers on the turbine, and the turbine then goes up into the generator and produces electricity. The correct answer is A.
2) Answer C describes the correct process, outlined above.
3) The answer is D. In short, the turbine turns the kinetic energy of water into mechanical energy, and the generator converts the mechanical energy into electrical energy.
