The correct option is C Yardangs
The surface of the earth has irregular layers of hard and soft rocks. In some arid regions, these layers are aligned vertically. As winds blow and erode the soft rocks, the hard rock formations may remain. Some of the abrasion that undercuts parts of the rocks may also help us in knowing the direction of dominant winds blowing in the area. These formations are called Yardangs. They are Erosional landforms formed by the wind.