Final answer:
The lines from Lowell's poem 'The First Snowfall' that best represent the poet's profound sadness at the death of his daughter are lines 32 and 7.
Step-by-step explanation:
The lines from Lowell's poem 'The First Snowfall' that best showcase the poet's profound sense of sadness at the death of his daughter are lines 32:
The scar of our deep-plunged woe.
This line conveys the depth of the poet's grief and the emotional impact of his daughter's death. It suggests that his sorrow is so profound that it has left a lasting mark on his heart and soul.
Additionally, in line 7, the poet describes how even the smallest and most insignificant aspects of nature are transformed by the snowfall, indicating the pervasive nature of his sadness:
And the poorest twig on the elm-tree
Was ridged inch deep with pearl.
This image underscores the poet's melancholy and emphasizes the idea that his sorrow is all-encompassing.