Introduction / Context:
A skein is a length or coil of yarn sold or wound as a unit. We seek a pair where the first term is a standard bundle or commercial unit and the second is the material packaged in that unit.
Given Data / Assumptions:
- skein → bundle/unit of yarn.
- Correct choice should mirror unit-of-sale or bundle-of measurement relationship.
Concept / Approach:
- Scan for a conventional packaging/quantity term paired with its material (e.g., ream of paper).
- Reject action/object or source/product pairs.
Step-by-Step Solution:
1) Confirm model: unit/bundle → material.2) 'ream : paper' — a ream is a standard quantity of paper; matches perfectly.3) 'squeeze : lemon' — action vs. object.4) 'fire : coal' — relation is fuel-to-process; not quantity bundle.5) 'tree : lumber' — source-to-product, reversed.6) 'plow : acre' — tool-to-area; not a packaging unit.
Verification / Alternative check:
Industry terms: skein of yarn, ream of paper — both are standard merchandising units.
Why Other Options Are Wrong:
squeeze : lemon — verb–noun pairing.fire : coal — usage relation, not packaging.tree : lumber — raw-to-processed material, not unit.plow : acre — implement vs. measure of land.
Common Pitfalls:
Choosing production or action associations rather than standardized bundle terms.
Final Answer:
ream : paper
Discussion & Comments