Classification (material → product vs item → category): Three pairs show a raw material used to make finished products; one pair instead names an item that belongs to a broader category. Identify the odd pair.

Introduction / Context:
Many verbal-classification questions contrast a consistent semantic relation with a single, subtly different relation. Here, three pairs express a material → product mapping (a raw or base material is used to produce a finished good), whereas one pair expresses item → category membership (a specific object that is an example of a broader class). The challenge is to detect this relational mismatch quickly and reliably under exam conditions.

Given Data / Assumptions:

• Twigs : Nest → birds typically use twigs to construct nests; twigs are input material.
• Wood : Furniture → wood is a standard furniture-making material; clear input–output relation.
• Gold : Ornaments → gold is worked into jewelry/ornaments; again material → product.
• Pitchers : Pottery → a pitcher is a type of pottery; this is item → category (hyponym → hypernym), not material → product.

Concept / Approach:
Test each pair with the template “Y is made from X.” If this paraphrase is natural and precise, we have a material → product pair. If the better paraphrase is “X is a kind of Y,” the relation is item → category, which is the outlier here.

Step-by-Step Solution:

Verification / Alternative check:
Reverse each pair and see whether “X is material of Y” holds. Only the three material → product pairs survive this reversal logically; the pitcher example collapses into taxonomy, not fabrication.

Why Other Options Are Wrong:

Common Pitfalls:
Accepting any association within the same domain (household objects, crafts) as equivalent. Always label the exact relation: input material vs class membership.

Final Answer:
Pitchers : Pottery