Final answer:
The author uses personification in line A) 'Protecting each other, right in the center/a few pages glow a long time.'
Step-by-step explanation:
Personification is a literary device where human qualities are given to animals, objects, or ideas. It is a common feature in poetry that adds vivacity to expressions, as it contributes to the readers’ imagination. In this particular case, we would look for a line in the poem in which the author treats an inanimate object, animal, or idea as if it had human characteristics or emotions.
In the poem provided, the author uses personification in line A) 'Protecting each other, right in the center/a few pages glow a long time.' In this line, the author personifies the pages of a book by suggesting that they have the ability to protect each other and glow.