Personification is used to provide meaningful description.
Personification means that something non-human is described as having human qualities. Here is an example of the road personified:
It wandered along in curves and easy angles, swayed off and up in a pleasant tangent to the top of a small hill, ambled down again between fringes of bee-hung clover, and then cut sidewise across a meadow. (Ch. 1)
This description shows the road being described as if it were actually walking, and taking its time with where it went, not walking in a straight path. It is an appropriate description because it can explain how a road would end up crooked in the first place, and it kind of describes how a person would walk.
Sometimes personification is not as direct.
The rowboat slipped from the bank then, silently, and glided out, tall water grasses whispering away from its sides, releasing it. (Ch. 12)
In this example, the grasses are described as if...
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