Analogies — “part forms whole” hierarchy Prompt: Letter : Word ⇒ ? Choose the pair that follows the same unit-to-aggregate relation.

Introduction / Context:
Many analogy items rely on structural hierarchies. “Letter : Word” captures a “unit forms aggregate” relationship in language: letters combine to form words. We must find the same composition pattern in the options.

Given Data / Assumptions:

• A letter is a smallest building block in written language for making words.
• We need a parallel where small units combine into a larger, standard whole.
• Non-structural or causal relations are distractors.

Concept / Approach:
Identify which option features elements that combine to produce a conventional composite. Pages forming a book is a direct analogue to letters forming words, both being canonical compositional hierarchies in print/writing systems.

Step-by-Step Solution:

Verification / Alternative check:
Swap roles: letters aggregate to words; pages aggregate to books. Both reflect discrete units assembling into a recognized whole, preserving order and function.

Why Other Options Are Wrong:

• Product : Factory — production relation, not part-whole composition.
• Club : People — reversed orientation and sociological grouping, not a fixed physical composition.
• Home work : School — task-location, not composition.

Common Pitfalls:
Confusing cause or membership with strict part-whole construction. Composition requires units that inherently constitute the whole.

Final Answer:
Page : Book