Arrange the following construction-related terms into a logical order from groundwork to a usable room. Items: (a) Windows (b) Walls (c) Floor (d) Foundation (e) Roof (f) Room

Introduction / Context:
We must order building elements by typical construction/assembly logic from the ground up until the space is usable as a room. Exact on-site sequencing can vary, but exam-style reasoning expects a coherent structural progression.

Given Data / Assumptions:

• (d) Foundation is always first.
• (b) Walls rise on the foundation to form the envelope.
• (a) Windows are openings/fixtures set into walls.
• (e) Roof caps the structure.
• (c) Floor (final usable finish) can be considered after the shell is weather-tight.
• (f) Room represents the finished usable space.

Concept / Approach:
Go from structural base to enclosure and finishing. Many textbooks group windows with wall work before roofing; others roof before finishing floors. Among the given choices, the most coherent is Foundation → Walls → Windows → Roof → Floor → Room.

Step-by-Step Solution:

Verification / Alternative check:
The sequence forms a sensible path from ground to enclosed, finished interior.

Why Other Options Are Wrong:

• d, e, c, b, a, f: Roof before walls is illogical.
• d, a, e, f, b, c and d, c, e, f, b, a: Mix enclosure and finishing in an incoherent order.

Common Pitfalls:
Placing roof before walls or finishing before enclosure.

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