Hey there!
Here is your answer:
The proper answer to this question is "simile".
Reason:
A simile contains like or as and a metaphor does not. So in the sentence: It felt as if the whole globe was dressed in snow. It has the word AS in the sentence therefore its a simile!
Also....
Similes, and metaphors are two things that are comparing themselves to each other. The trick is the similes have to have like or as, and metaphors do not!
Therefore the answer is simile!
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit