Wind is the key agent involved in the formation of landforms like inselbergs, yardangs, and zeugen. Wind erosion and deposition processes play a significant role in shaping these unique geological formations. Let's explore in detail how wind influences the formation of these landforms.

1. Inselbergs:
- Inselbergs are isolated hills or mountains that rise abruptly from a flat surrounding landscape.
- Wind erosion is the primary factor in the formation of inselbergs. Over time, the wind erodes the softer surrounding rock layers, leaving behind the more resistant rock formations as prominent hills or mountains.
- The wind carries small particles of sand and dust, which act as abrasives, gradually wearing down the softer rocks and sculpting the inselbergs.

2. Yardangs:
- Yardangs are elongated, streamlined landforms that are typically found in arid or desert regions.
- Wind erosion is the main process responsible for the formation of yardangs. As the wind blows across the landscape, it picks up loose sediment and particles.
- These suspended particles act as sandblasting agents, continuously bombarding the exposed rock surfaces.
- Over time, the wind erodes the softer rocks more rapidly, creating elongated depressions or troughs known as yardangs.

3. Zeugen:
- Zeugen are elongated, ridge-like landforms that often form parallel to the prevailing wind direction.
- Wind erosion and deposition work together to shape zeugen. As the wind blows across a landscape, it transports and deposits sediment.
- The deposited sediment accumulates on the windward side of obstacles like hills or ridges, creating a protective barrier.
- The windward side experiences less erosion, while the leeward side is more exposed to erosion. This differential erosion creates elongated ridges known as zeugen.

In conclusion, wind is the primary agent involved in the formation of landforms like inselbergs, yardangs, and zeugen. Through the processes of erosion and deposition, wind shapes these unique geological features in arid and desert regions.