The answer i chose is A the tilt of the Earths axis
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Choice B, because the beetle gets energy from A. The racoon gets energy from the beetle, B, and corn. And B gets its from blackberries.
During sexual reproduction, the genetic material of two individuals is combined to produce genetically-diverse offspring that differ from their parents. The fact that most eukaryotes reproduce sexually is evidence of its evolutionary success. In many animals, it is actually the only mode of reproduction.