Classification – Odd one out (landforms vs moving ice mass): Choose the outlier: Mountain, Valley, Glacier, Sea-coast.

Introduction / Context:
Physical geography distinguishes static landforms from dynamic bodies of ice/water. Three options are landform types/terrain settings; one is a moving body of ice (an agent of erosion), not a landform itself.

Given Data / Assumptions:

• Mountain → elevated landform.
• Valley → elongated low area between hills/mountains.
• Sea-coast → coastal landform/shoreline region.
• Glacier → moving mass of ice that shapes landforms.

Concept / Approach:
Separate “terrain type/landform” from “geomorphic agent (ice mass).” The ice mass is the outlier.

Step-by-Step Solution:
Mountain/Valley/Sea-coast → landform/terrain categories.Glacier → mobile ice body, not a landform category.

Verification / Alternative check:
Glaciers create landforms (cirques, moraines, fjords) but are not themselves landforms; they are agents that form landforms.

Why Other Options Are Wrong:

• Mountain, Valley, Sea-coast denote stable geo-settings.

Common Pitfalls:
Equating the creator (glacier) with the created (glacial landforms).

Final Answer:
Glacier