Final answer:
Comparative Advantage, as defined by Adam Smith, is the ability of a country to produce a good at a lower opportunity cost than any other country.
Step-by-step explanation:
Comparative Advantage, as defined by Adam Smith, is the ability of a country to produce a good at a lower opportunity cost than any other country. This means that a country can produce a good more efficiently, using fewer resources, than other countries. It is a concept that encourages countries to specialize in the production of goods in which they have a comparative advantage, and then trade those goods for things in which other countries have a comparative advantage, resulting in increased global production and higher levels of consumption.