Answer:
youth and innocence are present in the poem only in the fact that it marks them leaving. "She is crying also because she sees the link between death in nature and man's inevitable death" Shows naivety being lost, and a more mature realization about the concept of death.
Youth and Innocence often go with ignorance and bliss. "Ignorance is bliss" is largely used to question what someone is willing to know, and what someone could learn that hurt just knowing. In the poem we see knowledge and sadness expressed,"she is also crying because she sees the link...",the end of her ignorance and bliss.
Explanation:
Rereading with the idea of what makes someone youthful or mature, the answer may vary person to person.
I saw crying over painful new knowledge as a maturing moment.
I thought of all the things used to signal youth, rose tinted lenses, to happiness, to naivety, when I tried to sum it up I remembered the expression ignorance is bliss. That phrase suited my reasoning of crying over new knowledge, being the opposite of how youth would be shown.
