Final answer:
The main theme of the poem 'Love From the North' is the unexpected change of heart and the consequences of following one's desires. The rhyme scheme contributes to the overall effect and rhythm.
Step-by-step explanation:
The main theme of the poem 'Love From the North' by Christina Rossetti is the unexpected change of heart and the consequences of following one's desires instead of staying committed to a previous commitment. The rhyme scheme of the poem, which follows the pattern 'a b a b c d d ce fe f,' contributes to the meaning and overall effect by creating a sense of musicality and rhythm. It also helps to emphasize the repeated lines at the end of each stanza, reinforcing the theme of longing and regret.