नदी के प्रवाह मार्ग में युवावस्था से वृद्धावस्था तक बनने वाली निम्नलिखित नदीय भू-आकृतियों को सही क्रम में व्यवस्थित कीजिए: 1. जलप्रपात2. विसर्प (मीएंडर)3. बाढ़ का मैदान4. डेल्टा

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?