Final answer:
The lines 1-6 in Paul Laurence Dunbar's 'With the Lark' establish a thematic and structural contrast between night and dawn, correlating to a shift from sorrow to joy.
Step-by-step explanation:
The structure of lines 1-6 in With the Lark by Paul Laurence Dunbar contributes to the central meaning of the poem by setting up a contrast between night and dawn, developing distinct experiences of each. The poem opens with the theme of sorrow associated with the night and transitions to the joy of the dawn. This contrast is emphasized through the rhyme scheme, with each pairing of rhyming words representing the shift from the darkness of night to the light of dawn. This contrast mirrors the recurring shift in mood from despair to hope, and from sorrow to joy.