What is the most prominent figurative language element in this excerpt from the poem ñthe first snowfallî by james russell lowell?

every pine and fir and hemlock
wore ermine too dear for an earl,
and the poorest twig on the elm-tree
was ridged inch deep with pearl.

a. simile
b. alliteration
c. synecdoche
d. personification
e. hyperbole

I'd say that the most prominent figurative language element in this excerpt is D. personification, because it talks about trees that have almost human qualities of wearing clothes, etc.
Simile is when you compare two or more things using words such as like or as.
Synecdoche is when you represent a part as a whole or vice versa. 
Hyperbole is exaggeration.