AP English Literatur

Metonymy is a figure of speech in which a thing or concept is referred to by the name of something closely associated with it. Among the examples you provided, A."Jack bought a new set of wheels." and B."He has many mouths to feed." are examples of metonymy, while "The horizon glowed a deep red orange." is not. Here's the analysis:

"Jack bought a new set of wheels."

In this sentence, "wheels" is used to represent a car. Wheels are a part of a car, and by using "wheels" to refer to the entire vehicle, metonymy is employed. It's a common way to talk about buying a car in a more informal or creative way.