Hi There! :)
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What is geothermal energy?
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Geothermal energy<span> is the heat from the Earth. </span>
B) mitochondria
hope this helped :)
I am going to go with either C,A B.
I'm not entirely sure. it's just what i think
A substance used, or acted on, by another process or substance such as a reactant in an enzyme catalysed reaction.
