Hi,
The central aspect of a person's well being is<span> their spiritual health.</span>
Answer:
A. RNA
Explanation:
Genes go from DNA to (m)RNA via transcription. Then, RNA is converted to protein via translation. For eg, the insulin hormone is a peptide hormine (peptide is basically protein) which comes from insulin mRNA which was the result of transcription of insulin gene in beta islet cells of pancreas.
The circulation that disperses oxygen & rich blood throughout the body, is "Systematic Circulation."