The term that best fits the box labeled is reproducing molecules (Option D). It is a prerequisite for life.
What are organic reproducing molecules?
Organic reproducing molecules are specific biomolecules that are capable of self-replicating on their own.
The emergence of organic reproducing molecules such as nucleic acids (either DNA or RNA) is a prerequisite for life.
Another prerequisite for life is the emergence of macromolecules having catalytic activities (e.g., ribozymes or enzymes).
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