Final answer:
The absence of personification in the second half of the poem suggests a sense of alienation or separation.
Step-by-step explanation:
In the second half of the poem, the absence of personification of nature signifies a shift in the speaker's perspective. While the first half emphasizes the connection between the speaker and the natural world through personification, the absence of it in the second half suggests a sense of alienation or separation.
This shift is significant as it reflects the speaker's changing emotions and experiences.