Final answer:
Coevolution is the term that explains the evolutionary relationship between prokaryotes and eukaryotes through mutual evolution in response to environmental changes.
Explanation:
Coevolution is the term that best describes the evolutionary relationship between prokaryotes and eukaryotes since it involves species in symbiotic relationships evolving together. This process occurs as a response to changes in the environment, where one species changing necessitates changes in the other species to adapt.
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