Answer:
-Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.
Answer:
Christian ???
Explanation:
It is known in Judeo-Christian tradition
They are divided into degrees so that we can know the exact location :)
