निम्नलिखित में से कौन सी प्राकृतिक घटना विशेष रूप से एक घुमावदार फ्रैक्चर सतह (surface of rupture) के साथ मिट्टी या चट्टान के द्रव्यमान की पीछे की ओर घूर्णन गति (backward rotational motion) द्वारा विशेषता है, जो इसे एक विशिष्ट प्रकार के भूस्खलन के रूप में अलग करती है?

The crescent-shaped sand dunes found in Sam, Jaisalmer are scientifically known as:

With reference to fjords, consider the following statements: I. They are deep, narrow inlets carved mainly by glaciers and later occupied by seawater. II. The shallow sill near their mouth is generally associated with glacial deposition rather than with tectonic uplift alone. III. They are chiefly associated with high-latitude or formerly glaciated coasts, rather than with humid tropical landscapes. How many of the statements given above are correct?