Correct Answer:
C. Night
This analogy establishes a relationship between a prominent celestial body and the specific period of time it primarily dominates or is associated with. The first pair, "Sun : Day," indicates that the sun is the celestial body that defines and illuminates the daytime period. We need to find the corresponding time period primarily associated with the moon.
- A: Evening is incorrect because evening is a part of the day, transitioning into night, but not the entire period primarily defined by the moon.
- B: Light is incorrect because while the moon provides some light (reflected sunlight), "light" is a general concept and not the specific time period associated with the moon's prominence.
- C: Night is the correct answer. Just as the sun is the defining feature of the day, the moon is the most prominent celestial body visible during the night, often illuminating the darkness. This maintains the consistent relationship of a celestial body being strongly associated with a particular segment of the 24-hour cycle.
- D: Sky is incorrect because both the sun and the moon are found in the sky, but the sky itself is not a time period.
Therefore, the analogy correctly completes as Sun : Day :: Moon : Night, reflecting their primary temporal associations.