What steps are involved in the production of hydroelectric power?

a. falling water turns a turbine that generate electricity

b. moving water turns a paddle wheel that generate electricity

c. potential energy of after is directly transformed into electrical energy

d. water falls down a pipe to generate electricity

Option A

Explanation:

In the process of generating hydroelectricity , following process takes place

a) Water is retained through dam and is stored at high elevations

b) Water is then allowed to fall from great heights. In this process the potential energy  (attained due to storage of water at great heights) is transformed into another energy form i.e kinetic energy

c) In the next stage, kinetic energy of water is used to rotate the turbine blade.  

d) The turbine is connected to the motor which is placed between two magnets.  

e) As the rotor rotates between the two magnets, electricity is generated.

Hence, option A is correct

i am going to guess that it is co2.