'Flower' is related to 'Petal' as whole to part (component unit). In the same way, a 'Book' is related to which component unit?

Introduction / Context:
Whole–part analogy: a petal is a constituent part of a flower. The corresponding constituent of a book is a page (or pages). We must pick the true physical component unit.

Given Data / Assumptions:
Petal is a physical part of a flower; a page is a physical part of a book.

Concept / Approach:
Select the option that denotes a concrete component of the whole, not an external relation (author) or container (library).

Step-by-Step Solution:

Verification / Alternative check:
“Cover” is also a part but not as canonical as “page” for the main content-bearing unit, which mirrors the petal's canonical role for a flower.

Why Other Options Are Wrong:

• Content: Abstract, not a physical part.
• Author: Creator, not a component.
• Library: Container/collection, not part of a single book.

Common Pitfalls:
Choosing abstract relations over physical part–whole structure.

Final Answer:
Page