Final answer:
A country has an absolute advantage when it uses fewer resources to produce a good, while it has a comparative advantage when it can produce a good at a lower opportunity cost.
Step-by-step explanation:
A country has an absolute advantage over another country in producing a good if it uses fewer resources to produce that good. This can be due to a country's natural endowment or high levels of productivity in all goods. For example, a country that can extract oil more efficiently than another country has an absolute advantage in oil production.
However, even if a country has an absolute advantage in all goods, it can still benefit from trade through comparative advantage. Comparative advantage is when a country can produce a good at a lower opportunity cost compared to other countries. By specializing in producing a good with the least opportunity cost, a country can produce more and trade with other countries, ultimately increasing global production and consumption.
In summary, a country has an absolute advantage when it uses fewer resources to produce a good, while it has a comparative advantage when it can produce a good at a lower opportunity cost. Both absolute and comparative advantage play a role in trade and the overall efficiency of global production.