The correct answer is option A, that is, quickly moving neutrons coming out of the reaction are slowed down by water. The water heats up and turns into steam. The steam turns the turbine and produces electricity.
A nuclear reactor generates and monitors the discharge of energy from dissociating the atoms of certain elements. In a nuclear power reactor, the energy discharged is utilized as heat to give rise to steam in order to produce electricity.
The objectives for using nuclear power to generate electricity are similar for the majority of the reactor. The energy discharged from spontaneous fission of the atoms of the fuel is hitched as heat in either as water or gas and is utilized to generate steam. The steam is used to drive the turbines that generate electricity.