Question

\do not go gentle into that good night\ is an example of an extended ______ in which day represents a life cycle.

○ allusion
○ metaphor
○ allegory
○ simile

Explanation:

An extended metaphor sustains a comparison throughout a work. In "Do Not Go Gentle into That Good Night," the day/night cycle is sustained as a metaphor for the life/death cycle across the poem. Allusion refers to referencing another work, allegory is a narrative with hidden moral/political meaning, and simile uses "like" or "as" for comparison, none of which fit here.

Answer:

Metaphor