Answer:
"The sun peered at the ravens from behind the cloud." - Personification
"The flock of ravens darkened the sky like thunderclouds." - Simile
"Snow, that great eraser, made the flock of ravens disappear." - Metaphor
Explanation:
Personification is the attribution of a personal nature or human characteristics to something nonhuman, or the representation of an abstract quality in human form.
A simile is a figure of speech that directly compares two things, using the words "like" or "as."
A metaphor also compares two things, however metaphors say something is something else, not using the words "like" or "as."