A) Load content of the stream reaches above saturation point
B) Load that is being carried by stream over the mountain slopes becomes too heavy to carry over gentler gradients
C) Due to natural vegetation at mountain foot
D) None of the above
Correct Answer: B
Solution :
[b] An alluvial fan is a fan or cone shape deposit of sediment crossed and built up by streams. They are usually created as flowing water interacts with mountains hills or the steep walls of canyons. The load that is being carried by stream over the mountain slopes becomes too heavy to carry over gentler gradients and hence alluvial fans are formed.
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