The tone of Annabel Lee by Edgar Allan Poe is nostalgic since this is the story of a man, his beloved one and her death.
He says that their level of love was beyond everything and anything that could exist and how because of that deep love that they both share they souls are connected even beyond her death.
According to Emerson, what is a "lover of nature?" ... A lover of nature is a person whose inner and outer senses are still aligned, who remains young at heart and who feels the necessity of communicating with nature on a daily basis.
Based on this passage, the tone of the poem might best be described as reflective because the character is illustrating his innermost thoughts and emotions.
The answers is
unimportant
unsupported
One of the two I say unsupporting but the context and the thesaurus doesn't really explain so i say go with either one.