Information about wolves appearance

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.

Which of the following statements best describes the concept behind labor unions?

Oil is a renewable resource can be used directly from the ground is the least polluting energy source must be removed from the earth using drills