What happens to the heat that is produced from fission reactions that occur in nuclear power plants?
a. it is used to turn water into steam.
b. it is used to heat local buildings.
c. it is a waste product and is not used.
d. it is used to power nuclear fusion reactions.

a. it is used to turn water into steam.

Explanation:

In fission reaction the reaction is carried out in the reactor which is surrounded by water.

When energy is released in fission reaction it is absorbed by the water which is surrounding the reactor and then that water is converted into steam using this energy of fission

Further this steam is used to operate turbine which will convert the energy of team into electrical energy.

So in this way first of all the in this fission reaction energy is used to convert water into steam

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explanation:

power out to power in less than 100%