पॉवेलद्वारा वर्णित अनुवांशिक वर्गीकरणाच्या आधारावर डेवीसने उताराला अनुसरुन, दरीच्या प्रकारांचे वर्गीकरण विकसित केले, ते कोणते ?

The correct answer is Option B (Consequent, Subsequent, Obsequent, Resequent, Insequent).

Key Points:
• Geomorphology - Genetic Classification of Valleys and Drainage Streams:
• Powell & W.M. Davis Classification: Building upon John Wesley Powell's base concept of genetic classification, William Morris Davis classified valleys and river systems according to regional geological slope and underlying structure into:
• 1. Consequent (अनुवर्ती): Flowing directly in accordance with the initial regional slope.
• 2. Subsequent (परावर्ती / उत्तरवर्ती): Developed along lines of structural weakness or softer strata.
• 3. Obsequent (प्रत्यानुवर्ती): Flowing in an opposite direction to the original consequent slope.
• 4. Resequent (नवानुवर्ती): Flowing in the same direction as the consequent but at a lower base level.
• 5. Insequent (अक्रमवर्ती): Flowing without following any clear structural or slope controls.
• The classified valley types are Consequent, Subsequent, Obsequent, Resequent, Insequent (Option 2).
• Key Takeaway: Davis classified slope-based genetic valleys into Consequent, Subsequent, Obsequent, Resequent, and Insequent.