Areas of high vulnerability to stream erosion are (points : 3) polar areas with seasonal rainfall mountainous regions with high rainfall flat areas with high rainfall temperate areas with intermittent rainfall

mountainous regions with high rainfall

Explanation:

The area of the high variability of stream erosion in mountainous regions that have a very high variability of the rainfall and as compared to the polar region which has a low amount of precipitation and those of the regions with an intermediate amount of rainfall.

Answer they are produced by collision of tectonic plates;