Ineed this stanza analysed. i’ll mark a brainliest

my heart aches, and a drowsy numbness pains
my sense, as though of hemlock i had drunk,
or emptied some dull opiate to the drains
one minute past, and lethe-wards had sunk:
'tis not through envy of thy happy lot,
but being too happy in thine happiness,—
that thou, light-winged dryad of the trees
in some melodious plot
of beechen green, and shadows numberless,
singest of summer in full-throated ease.

This means that he feels very drugged as if he had just taken an opioid or something. He hears a nightingale singing saying that the bird is spreading its happiness too much. He is also saying that he too is happy because he can hear the nightingale sing somewhere amidst the forest.

innocence can be defined as the lack of sin, relating it with the lack of guilt, also it can be a synonime of naivety. most people agree that sins are made out of experiences, intentionally or not, as well as you stop being naive once certain things happen to you throughout your life. so, with this explained, the chosen answers are:

when the boy saw the effects of war, he no longer viewed life as innocent.

the loss of innocence is a result of gaining experience and making mistakes.

one way to define innocence is as a lack of worldly experience or sophistication.