Analogy: Shoe is to Leather as Highway is to ____. Pick the material most directly associated with the finished product.

Introduction / Context:
The relation is “product : primary material.” Shoes are commonly made of leather. We need the analogous material for highways.

Given Data / Assumptions:

• Shoe → leather (material).
• Highway → paving material.

Concept / Approach:
Most highways are surfaced with asphalt (or concrete), making “asphalt” the standard material pairing parallel to “leather.”

Step-by-Step Solution:
Identify material-level pairing, not worker or component.Select “Highway : Asphalt.”

Verification / Alternative check:
Other choices are role–person or vehicle–component relations, not material–product.

Why Other Options Are Wrong:
They mismatch relation types (e.g., doctor is a person, wagon is part of a train).

Common Pitfalls:
Choosing a functional relation rather than a material relation.

Final Answer:
Highway : Asphalt.