The following structural elements best support the interpretation that the rain is a powerful force in the narrator's life:
C. The onomatopoeia and the couplet.
The couple is what closes the poem. It emphasizes rain’s presence on the poem as the rhyme of the couplet is the word ‘rain’.
You had a stroke didn’t you?
I believe it is personification because he is giving the sand the ability to stretch and to be alone which sand cannot do.