What does international trade involve?

International trade specifically involves the buying and selling of goods and services across national boundaries. This process allows countries to exchange resources, products, and services that they may not have in abundance or that can be more efficiently produced elsewhere. By engaging in international trade, countries can benefit from comparative advantages, leading to greater efficiency and better selection for consumers. It also fosters economic cooperation and interdependence among nations, which can contribute to peace and shared growth.

In contrast, the other options focus on activities that are confined within a single country or local market, which do not encompass the dynamics and complexities of international exchanges. Therefore, they do not accurately define international trade, which is fundamentally about crossing borders and expanding markets beyond domestic confines.