Answer:
earth sun
Explanation:
Thp90% of the earth uses solar energy
It acts as a reactant in a chemical reaction.
PCR allows for the analysis of DNA fragments through the comparison of the base pairs each molecule contains, which can then be used for genetic screening and the identification of individuals and DNA fragments
Because the world rotates around and God the creator changed up the earth that's the biblical answer but a scientific answer would be due to himans