5. the generation of electricity relies primarily on chemical reactions mechanical energy wind farms bioconversion

Option B, Mechanical energy

Explanation:

In the electricity production, whatsoever be the medium/raw material used for electricity production, the ultimate goal is to rotate the turbine of the generator which is connected to a coil held between two magnets.  This is so because until unless the coil rotate between the magnets no electricity will be produced. Since rotation of a coil is linked to rotation of turbine which is nothing but a kind of mechanical exercise. Thus, it can be said that the generation of electricity relies primarily on mechanical energy.

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