Analogy — “Thick : Thin :: Idle : ?”. Select the antonym that completes the pair.

Introduction / Context:
The stem “Thick : Thin” encodes an antonym relationship. We must choose the standard opposite of “idle” to preserve the same pattern. In work/effort vocabulary, “industrious” is the canonical antonym of “idle.”

Given Data / Assumptions:

• We are dealing with adjective–adjective antonyms.
• Distractors may be nouns or near-synonyms that do not mirror the pattern.

Concept / Approach:
Filter for a direct opposite adjective matching the part of speech and semantic field (work/effort).

Step-by-Step Solution:

Verification / Alternative check:
Dictionaries list industrious/diligent as antonyms of idle; choose the most conventional opposite.

Why Other Options Are Wrong:
They are wrong part of speech or not opposites.

Common Pitfalls:
Picking a positive adjective in general (e.g., “virtuous”) instead of the precise antonym.

Final Answer:
Industrious