Why did early humans migrate from one place to another?

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.

Me what confession does hester make to dimmesdale while in the forest in chapter 17 of the scarlet letter ?

An individual who is experiencing a prolonged period of stress would likely have levels of circulating than an individual who was not experiencing stress.