Most nations of the world export goods to other countries. Like-wise, most (import) goods from other nations. Why do countries of the world engage (in) international trade?
Some nations of the world have certain conditions or resources that (provide) them with a basis for international trade. Columbia and Brazil have just the right (climate) for growing coffee. They export the surplus to earn foreign exchange to (pay for) the goods they import.
If a country has an abundance of natural (resources), it is common for (it) to export some of these resources. Rubber from Malaysia and oil from some of the Middle East countries (being) examples.
If a nation is (advanced) in science and technology, it can produce sophisticated machinery and (equipment), such as computers, jet airplanes and electric generators. Their manufactured goods are usually sold at (high) prices in international market. So they enjoy (favorable) conditions in international trade.
In addition to trade (in) goods, there is another form of trade, i.e. trade in service. The former is called visible trade, and the latter, invisible trade.
Transportation, insurance, financing and tourism are some of the forms of (invisible) trade. Invisible trade can be as important to some nations as the export of goods is to others.