" As if the air about us was actually poisonous." (page two) This figurative language is a metaphor because it saying the air is poisonous but the air just smells bad
"There are jungles with a maze of traits in them." (page 7) This figurative language is a personification because its giving something non human, human traits. By a maze with traits in them he really means the jungle has lots of hills and trees.
"Giant rocks with razor edges crouch like a sea monster with wide-open jaws." (page 8) This is a smile because its using like or as and its comparing the rocks to sea monsters crouching.