Arrange library-related items from smallest physical unit to the institutional whole: 1. Pages 2. Book rack 3. Library 4. Books 5. Catalogue

Introduction / Context:
This sequencing task moves from the smallest tangible unit in a library ecosystem to the large organisational entity. Understanding how items assemble into collections and then institutions is key.

Given Data / Assumptions:

• 1 = Pages (smallest physical unit here).
• 4 = Books (made of pages).
• 2 = Book rack (stores multiple books).
• 5 = Catalogue (the index/metadata system for holdings).
• 3 = Library (institution hosting racks, catalogues, and services).

Concept / Approach:
Use “part-of” relationships: pages form books; books go onto racks; racks/holdings are indexed in a catalogue; all of these are components within a library. Although a catalogue is informational rather than physical storage, it logically follows the accumulation of items to be indexed and precedes the whole institution in this abstraction ladder.

Step-by-Step Solution:

Verification / Alternative check:
Placing the catalogue at the very end conflates an indexing system with the institution; the library contains the catalogue, not vice versa.

Why Other Options Are Wrong:

• 2,5,4,3,1: Starts with a rack, which presupposes books/pages.
• 1,5,4,3,2: Jumps to catalogue before books exist to index.
• 1,2,4,5,3: Puts rack before books.

Common Pitfalls:
Thinking of “catalogue” as “the biggest thing”; remember it is a system inside the library’s operations.

Final Answer:
1, 4, 2, 5, 3