Otto von bismarck led which country to unification?

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.

What challenges did nigeria faced after it gained its independence from britain

The process of rocks breaking down and becoming other rocks