Which of the following features is associated with deserts?

Correct option is A

The correct answer is (a) Barchans

• ​Barchans are crescent-shaped sand dunes commonly found in desert regions.
• They form due to the action of wind, which moves sand into characteristic shapes.
• The curved side faces the direction of the wind, and the horns point downwind.

Key points:

• Crescent Shape: The characteristic shape of barchans helps them move across the desert landscape.
• Formed by Wind: Barchans form in areas with a predominant wind direction, which helps in transporting and depositing sand.
• Dynamic Movement: These dunes can migrate over time as sand is moved from the windward side to the leeward side

Information booster:

Alluvial Fan:

• An alluvial fan is a fan-shaped deposit of sediments that forms where a fast-flowing river slows down as it exits a mountainous region and enters a plain. This feature is associated with river systems, not deserts.
  

​Moraines:

• Moraines are accumulations of glacial debris (rock and soil) that are deposited by moving glaciers. This feature is typical of glaciated areas such as mountains and polar regions, not deserts.

Tarn Pools:

• Tarn pools are small mountain lakes or pools that form in glacially eroded basins. These are found in high-altitude regions affected by glaciers, not in deserts.