The main theme of the poem is the regret and sorrow the narrator feels about the end of his relationship with the woman in the poem, described only as "you." The poem suggests that the woman may well have been the one to break off the affair: Pale grew thy cheek and col
Answer: Pigeon and duck.
Explanation:
From that side of the tree, you can see that the pigeon and the duck are closest together in the tree than the other organisms in the other options.