Why do we use money instead of just trading things​

How does specialization enable countries to trade with one another? a country can make and sell goods affordably and buy goods that it is inefficient at making. a country can make what it chooses and sell its goods to other countries. a country can decide to buy everything it needs from other countries. a country can efficiently make goods that were once difficult to make.

Why is it necessary to obey social norms? write briefly.

Cattle are herbivores by nature and feeding herbivores a diet for carnivores may have triggered a protein reaction known as a prion causing mad cow disease