The choir is on wheels to a convention illustrates

Step 1: Analyze the question The sentence is "The choir is on wheels to a convention." We need to name the figure of speech it illustrates.

Step 2: Review the concepts

• Hyperbole: deliberate exaggeration for effect (e.g., "I've told you a million times").
• Allusion: an indirect reference to a well-known person, event, or text (e.g., "He is a Judas").
• Metonymy: replacing the name of a thing with something closely associated with it (e.g., "the crown" for the monarchy).
• Personification: giving human qualities to non-human things or ideas.

Step 3: Apply to the sentence "On wheels" is not an exaggeration, not a reference to a famous person or event, and not a human trait given to a non-human thing. It is a way of saying the choir is travelling, using "wheels" (a part or feature of the vehicle) to stand for the vehicle or the journey by road. The wheels are closely associated with the means of transport, so the expression substitutes a related item for the whole idea.

That is the pattern of metonymy (strictly, you could also say the part-for-whole substitution is close to synecdoche, but synecdoche is not among the options, so metonymy is the best fit).

Step 4: Eliminate the others

• A (Hyperbole): nothing is overstated.
• B (Allusion): no external reference.
• D (Personification): the choir is already a group of people, and nothing non-human is given human traits.

Answer: C. Metonymy

Exam tip: Ask yourself, "Is something being replaced by a closely associated thing?" If yes, think metonymy (e.g., "the press" for journalists, "the throne" for the king, "on wheels" for travelling by vehicle). If a part stands for the whole, it is often synecdoche, but when only metonymy is offered, pick it.