Analogies — “object : essential internal part” Prompt: Candle : Wick ⇒ ? Choose the pair that best mirrors a physical object and its integral component.

Introduction / Context:
“Candle : Wick” signifies a physical object and an essential inner component enabling its function. The correct analogy should pair another object with a built-in, indispensable part rather than a separate tool or by-product.

Given Data / Assumptions:

• A candle necessarily includes a wick to burn properly.
• We must find a similarly integral part within an object.

Concept / Approach:
Look for part–whole where the part resides within or is permanently attached to the whole and is critical for normal operation, mirroring wick inside a candle.

Step-by-Step Solution:

Verification / Alternative check:
Remove the component and test functionality: a candle without a wick cannot function; a bicycle without wheels cannot function. The parallel holds strongly.

Why Other Options Are Wrong:

• Hammer : Nail — tool vs. fastener, not part–whole.
• Light : Bulb — effect vs. cause/device mismatch.
• Oven : Fire — contingent, non-essential in many ovens.

Common Pitfalls:
Confusing tool–target or cause–effect for integral part–whole relationships. The prompt requires an embedded, indispensable component.

Final Answer:
Bicycle : Wheel