Answer:
personification to describe the trees
Step-by-step explanation:
Personification is a literary device that is used when the author ascribes the quality of a human to an inanimate object. It is also used when an abstract quality is attributed to a human representation.
In the above sentence, the trees were described as having bare arms as if they were humans. This helps the reader to imagine a tree without leaves and fruits. So, the author attributed a human quality to the trees and this is personification.