Which line illustrates an allusion to a mythological figure?

• A. He faced his own Achilles' heel.
• B. The sun set over the quiet hill.
• C. A clever plan unfolded.
• D. They walked home together.

Answer: (A)

An allusion is a quick reference to a famous figure or story from myth or literature. In this line, the phrase “Achilles’ heel” invokes Achilles, the Greek mythic hero who was nearly invincible except for his vulnerable heel. Using that reference signals a specific kind of weakness the character is facing, letting readers bring to mind the myth and its meaning without a lengthy explanation. The other lines describe literal or everyday ideas without drawing on myth; the sun setting over a hill is a straightforward image, a clever plan is a common way to describe strategy, and walking home together is simply an action. So this line best demonstrates a mythological allusion.