A. collapsing dust clouds
Answer:
The value of ∠QPR is 40°.
The correct answer is - Stream velocity, channel width, and depth all increase.
When a stream is faced with a sudden increase of water, than the stream is starting to increase in velocity. The velocity is becoming bigger in the lower part of the stream. As the velocity increases, it is followed by an increase in width of the stream because it starts to flood the surrounding area, and because of the much bigger amount of water it also experiences increase in depth.
They have a short vertical range and wide geographic distribution
