European Countries- Better land use than Asian Countries and African Countries. Why? Why the Lands of these countries have less productivity?

answer; disconfirm the catharsis theory;

answer; developmental;

answer; a variety of simple organic compounds could be spontaneously synthesized from components in earths primitive atmosphere;

i believe the answer is: true

our brain need to reach a certain level of development   before it could interpret and understood sound with high difficulties. to proof this, we just need to pay attention in musical preference between children and adults. it is far less likely that children would enjoy things such as orchestra or rock band as much as adults due to the difference in this ability.