Economic productivity has declined in some countries as a result of:

As for me, I think that the main reason of the declining of economic productivity in some countries is a war.  In the conducting of military operations by the State in view of the mobilization of the whole array of the armed forces, the country's economy begins to unwittingly work on the process of the war as a whole. Often companies that previously engaged in manufacturing of any civil or technology things are changing skills and become involved in the manufacture of military items.  Also on war spending huge amount of money. Even taking into account the positive outcome of the final - winning - is not to say that the war - this is a positive factor for the economy.

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;

the hebrew bible is the sacred text of judaism;

the koran is that of islam.

among eastern religions, the sacred scriptures of hinduis are the four vedas and the upanishads, among others.

a main characteristic in these books is that un most of them we find certain "norms" of behavior, as is the case of the bible that has it's commandments. these rules are to regulate the behavior of believers and faithful of their respective faith.

these rules tell us what is right and what is not.