Answer:
my guess is because mountains are formed from earthquakes etc right? like convergent boundaries. so the two tectonic plates go towards each other like this -><- and they push each other upwards. over time, since the peaks are so high up, whethering carves the peak into a point.
Answer:
I think oasis
because wadis is probably a small dry region in a place where there are rains pouring sometimes
The defined as the level of biodiversity