The answer is b that’s the correct choice
Answer:
Vavilov noted the centers of origin of cultivated plants occurred mostly in Mountaintainous regions between the Tropic of Caprion (23°28') south of the equator and about 45°N of the equator in the Old world.
I can only answer the first question I really hope u can understand and goodluck
Answer:
The main difference between Russia and the Soviet Union is that Russia is the name of a single country of Asia while the Soviet Union was the name of former federation of Communist Republic comprise of fifteen republics.
Well first if we needed to get more and more meat by the years that means we would have to breed and kill more cows,chickens,pigs,sheep basic farm animals that are eaten more than others and for vegetables and fruits we would have to give up space for trees and bushes.
Hunting wild animals is what they did