C.a natural area hope you like my answer
A stable income
A stable job
Legally owning property
Possibly a family
Good health
I would assume, the best way to measure if it's achievable would be making a graph of various ages and seeing when most people achieve these indicators and how many do it.
Answer:
The answer for your question is none of the above in my opinion.
Rhyme and rhythm are two techniques that are being used. (Edit) also repetition.
