Classification – Types of human dwellings vs industrial building: identify the odd one out. Three are dwellings/shelters for people; one is primarily a place of production. Which option does not belong? Options: Igloo, House, Hut, Factory.

Introduction / Context:
Built-environment classification often splits residential structures from industrial ones. Igloo, house, and hut are types of human dwellings; a factory is an industrial facility for manufacturing.

Given Data / Assumptions:

• Igloo: traditional snow/ice dwelling.
• House: common residential building.
• Hut: simple residential shelter.
• Factory: industrial production facility.

Concept / Approach:
Group by primary function: habitation vs production. The production facility is the outlier.

Step-by-Step Solution:
Step 1: Tag each as dwelling or industrial.Step 2: Igloo/House/Hut are dwellings.Step 3: Factory is industrial; thus, it is the odd one out.

Verification / Alternative check:
Consider occupancy: dwellings are lived in; factories are worked in.

Why Other Options Are Wrong:
Igloo/House/Hut: All are habitation structures.

Common Pitfalls:
Ignore material or climate differences; function is decisive.

Final Answer:
Factory