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.
Grain farming is done for economic activity and this makes it commercial. It is highly specialized and mechanised. The yield per acre is low so the farms are big. The yield is high per man so little manpower is needed for production. Grain farming is subject to market conditions like climate.
Because of all the industry they have there. Also because of all the mountains and how little space they have due to the huge population of Japan.
Between the 1870 and 1900
Let's think about what splits the earth, the equator splits the earth from North to South. The Prime Meridian is what splits the earth from East to West.
