In the last line of "god's grandeur," we see an unusual and complicated use of
a. repetition.
b. consonance.
c. assonance.
d. alliteration.

In the last line of God's Grandeur ("World broods with warm breast and with ah! bright wings"), we see an unusual and complicated use of alliteration. Alliteration is the repetition of the same consonant, in this case w: world, with, warm, wings.