What region are u referring to?
geophysical phenomena is earth and its environment in space for example its when earthquakes, Tsunami, Volcanic activity, cyclone stuff sorta like that
hope that helps
Answer:
The main reason airplanes fly in the stratosphere is because this is where the least amount of turbulence is found. In addition, because the stratosphere is very dry, there are fewer clouds in this layer, making for a much smoother ride overall.
Explanation: