Which of the following is NOT reason why a stream incises into its former floodplain to create a stream terrace?

(A) more discharge (e. g. a big flooding event)

(B) rising of the base level

(C) uplift of mountains

(D) lowering of sea level

D. Lowering of the sea level.

Explanation:

Stream incision is a cause and consequence of the increase in the river load carrying capacity and also its former floodplain if uplifted by the presence of mountain ranges and more discharge rates. As the streams channel drops the water in surrounding aquifers runs into the streams, thus lowering the water table a this modifies the flow pattern of the stream, and leads to large reductions of summer flows. The incision is thus a play of the river with its tools and speed of the river and the amount of discharge governs the flow patterns hense, this impacts the river way of cutting.