A nuclear reactor is a device that produces and controls the release of energy from splitting atoms of uranium. This energy is harnessed in order to boil water to make steam that then drives turbine generators. Nuclear power is a popular alternative to the traditional burning of fossil fuels that remains the primary source of energy in most places all over the world.
The answer is letter c, civilized and primitive do not have
a clear definition. It is because this theory focuses more on the evolution of
societies in which civilized and primitive does not have a clear definition of
how it is connected with this theory.