Physical geography — Siachen identification: What is Siachen in geographical terms? Context: Located in the eastern Karakoram, source region of the Nubra River and among the world’s longest outside the polar areas. Choose the correct landform/type.

Given data

• Siachen lies in the eastern Karakoram at very high altitude.
• Often referenced as the world’s highest battlefield and a major source of the Nubra River.

Concept / Approach
Siachen is a valley glacier (≈ 70–76 km long) — one of the longest non-polar glaciers on Earth — situated in the Karakoram range.

Elimination
It is not a pass, lake, desert, or river; it is an ice mass flowing slowly downhill.

Final Answer
Siachen is a glacier.