most basic way for trade to occur is of course through the importing and exporting of products from other countries. This is of
course what happens for the most part, however there are other forms of trade that can occur in the form of currency as well as services. Consider an auto manufacturer in the United States that contracts a factory in Mexico to assemble parts. This is a way of trading services with other countries. Trade can occur also other ways as well. It is just a matter of finding what is best for the business as well as what is good for the economy of the country as well.