International trade is an application of the principle of

International trade is an application of the principle of comparative cost advantage. This means that countries specialize in producing goods and services that they can produce at a lower opportunity cost than other countries. By doing so, countries can increase their production and efficiency, and trade with other countries to obtain goods and services that they cannot produce efficiently themselves. The principle of comparative cost advantage allows for more efficient use of resources and ultimately leads to greater economic growth and prosperity.