In this short riddle what everyday object has a spine but no bones?

Introduction / Context:
This is a simple riddle that uses a metaphor from anatomy to describe an inanimate object. The word spine suggests bones and the human back, but the puzzle asks you to find something that has a spine without literally having bones. Such riddles train lateral thinking and the ability to recognise figurative language in everyday expressions.

Given Data / Assumptions:
- The object described has something called a spine.- It does not contain bones, so the spine is not a biological structure.- The answer is intended to be a common household or everyday object.

Concept / Approach:
The key is to recall non living things whose parts are called spines. In everyday language, books have spines, which are the bound edges where pages are held together and titles are printed. This is an established term in publishing and printing. Books definitely do not contain bones, so they match both clues neatly. Other objects such as mirrors or tables do not have parts normally called spines.

Step-by-Step Solution:
Step 1: Interpret spine in a figurative sense, looking for objects whose central supporting part uses this word.Step 2: Recall that when you place books on a shelf you often see only their spines facing outward with the titles written on them.Step 3: Confirm that a book spine is not made of bones but of cardboard, glue, and fabric in most cases.Step 4: Compare this with the options provided and identify book as the only object that fits the description.

Verification / Alternative check:
A further check is to note that dictionaries, novels, and school textbooks all use the term book spine in publishing manuals. Mirrors do not have any part named a spine, and tables have legs and a top but no spine. Therefore the metaphor clearly points to books and not to the other objects listed.

Why Other Options Are Wrong:
Option A mirror does not feature any component called a spine in common language.Option C table also lacks a part that is called a spine in everyday descriptions.Option D none of the above is wrong because book is a correct and widely accepted answer.

Common Pitfalls:
Some learners think first of animals or living things and forget to consider non living objects. Others misinterpret the riddle as asking for something imaginary. The main trick is to notice that words like spine can be used metaphorically to describe central support structures in both living and non living contexts.

Final Answer:
The riddle is describing a book, which has a spine but no bones.