What literary device does the author use to make the setting drearier?
Read this passage from The Phantom Tollbooth
The sky became quite gray and, along with it, the whole
countryside seemed to lose its color and assume the
same monotonous tone. Everything was quiet, and
even the air hung heavily. The birds sang only gray
songs and the road wound back and forth in an endless
series of climbing curves.
O a homophone
O an idiom
onomatopoeia
a pun