Nature's first green is gold, her hardest hue to hold. her early leaf's a flower; but only so an hour. then leaf subsides to leaf. so eden sank to grief, so dawn goes down to day. nothing gold can stay.

which literary element does line 2 contain?
metaphor
personification
simile
understatement

B, personification. The second line is about how a leaf can't be gold for very long. Personification is a figure of speech in which inanimate or nonhuman things are given human characteristics or abilities. The leaf cannot be a her, so this is personification.

  . 2 is the