General George Marshall contribution during World war II according to the passage is he served as a chief of staff of the US Army. He also helped train US soldiers and airmen in modern warfare in their time. He also manage in the development and procurement of the weapons to helped advance the weaponry of the US Army.
<span>1000 acres of corn are grown by most farmers in greene iowa. This was like a revolution similar to industrial revolution in which the production of corn was increased 4 times by using some sort of fertilizer. Hence the corn was grown in such a bigger area covering 1000 acres of land.</span>
C) the south
Kalahari desert is in the south.
Hope this helps!