Is “the snow was a blanket ,covering the entire ground” a metaphor, smilie, or a personification?

This is a metaphor.

Similies use "as" or "like" to explicitly denote a comparison and personifications give human-like characteristics to animals, objects, or concepts.

Hope this helps! :)

what are the words supposed to be listed?

(you didn't attach a copy of the poem, but i'm answering as best as i can)

since a simile compares two unlike things using like or as, it kind of gives an item the ability to do something it can't.

example: "the player was like a tiger on the field"

in this sentence, the simile conveys the idea that the player was fast and strong, like a tiger.