Arrange the following elements of hill slope in correct sequence from top to bottom.
A. Waxing slope
B. Wanning slope
C. Debris slope
D. Free face
Choose the correct answer from the options given below:

Correct option is B

The correct answer is: (b), A, D, C, B
Waxing slope
Free face
Debris slope
Wanning slope
Slope, defined as angular inclinations of terrain between hill tops and valley bottoms, resulting from the combinations of many causative factors like geological structure, climate, vegetation cover, drainage texture and frequency, dissection index, relative reliefs and mass movements of rock wates, erosion and transportation of eroded materials etc.
The entire slope profile is punctuated by the presence of convexity, concavity, rectilinearity and free face.
These distinctive segments of slope profile are called elements or slope segments.
Summital convexity or waxing slope: the convex segment is found at the hill crest and this element is called summital convexity.
Free face: Free face element of hillslope represents wall like hill slope of bare rocks and is devoid of any debris.
Rectilinear element or debris slope: The rectilinear segment of hillslope profile between upper free face and lower concave element is called rectilinear element. Because of the presence of rock debris this element is called debris slope.
Concave element or wanning slope: The basal segment of an ideal hillslope profile is always characterized by concave element. The slope angle decreases as the segment of basal concavity increases. This is why this segment is called wanning slope.