Analogy — Artisan and principal material:\nCobbler : Leather :: Carpenter : ?\n\nSelect the material that a carpenter primarily works with, mirroring the cobbler–leather relation.

Introduction / Context:
The stem encodes “artisan : principal material.” A cobbler works chiefly with leather; a carpenter works chiefly with wood. The answer must be a material, not a product or a tool.

Given Data / Assumptions:

• Cobbler → Leather (material).
• Carpenter → ? (material).
• Options include products (Furniture, Chair) and a tool (Hammer).

Concept / Approach:
Preserve category parity: material vs product vs tool. “Wood” is the canonical material for carpenters, just as “leather” is for cobblers.

Step-by-Step Solution:

Verification / Alternative check:
Trade definitions tie carpentry to wood construction and joinery.

Why Other Options Are Wrong:

• Furniture/Chair: Finished products, not materials.
• Hammer: A tool; wrong category.
• None of these: Invalid, as “Wood” fits.

Common Pitfalls:
Matching “product” instead of “material”, breaking the cobbler–leather symmetry.

Final Answer:
Wood