Answer:
"Evil air, a frost-making stillness" is an example of a. metaphor.
Explanation:
A metaphor is a literary device used to describe an action or object in a way that is not really true or literal by introducing an implied comparison. This figure of speech defines an object or idea -in this case air and stillness- by suggesting a likeness or analogy with another -evil and frost-making- that are usually unrelated.
