Arrange the sequence related to producing a book: (a) Paper (b) Library (c) Author (d) Book (e) Pen. Choose the most logical order from creation to storage.

Introduction / Context:
This problem focuses on causal sequencing. We are given entities related to writing and distributing a book, and asked to order them from the earliest creative step to final placement.

Given Data / Assumptions:

• Author (c) initiates content creation.
• Pen (e) and Paper (a) symbolize the act of writing/typing (modern tools analogized).
• Book (d) is the finished product.
• Library (b) is the place of storage and public access.

Concept / Approach:
We arrange by production flow: creator → tools/media → product → repository. The exact tools (pen/paper) abstractly represent drafting/printing steps preceding the finished book.

Step-by-Step Solution:
1) Author (c) — source of the text.2) Pen (e) — writing tool (or symbolic of content drafting).3) Paper (a) — medium for text; in a modern context, this can represent typesetting/printing.4) Book (d) — compiled, bound artifact.5) Library (b) — archiving and access.

Verification / Alternative check:
Any ordering placing the library earlier than authoring is illogical. Similarly, a book cannot precede writing on paper.

Why Other Options Are Wrong:
(a) starts with library; (b) puts library before author; (d) starts with pen before recognizing the author’s role; these contradict causal dependencies.

Common Pitfalls:
Confusing materials with the creator, or final storage with production.

Final Answer:
c, e, a, d, b