The Farming of plants was a turning point in human history. Ths allowed larger civiliations and the first empires to emerge. Also, technical advances were possible because people could specialize in one subject, such as mathmatics, due to calorie surplus, a.k.a farmers making more foo than they need for themselves.
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im not 100% sure but i think its b
Explanation:
They are both democracies. The United States is based off of ancient Rome. The United States however simplified lots of complicated things from the Roman government.
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1) Dam. Raises the water level of the river to create falling water. Also controls the flow of water. The reservoir that is formed is, in effect, stored energy.
2) Turbine. The force of falling water pushing against the turbine's blades causes the turbine to spin. A water turbine is much like a windmill, except the energy is provided by falling water instead of wind. The turbine converts the kinetic energy of falling water into mechanical energy.
3) Generator. Connected to the turbine by shafts and possibly gears so when the turbine spins it causes the generator to spin also. Converts the mechanical energy from the turbine into electric energy. Generators in hydropower plants work just like the generators in other types of power plants.
4) Transmission lines. Conduct electricity from the hydropower plant to homes and business.
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