International trade occurs because countries do not produce the same cost. The country can produce any kind of a lower cost. Compared to other countries, it is a manufacturer and exporter of goods sold to other countries since production costs differ because. There are differences in the amount of resources and said there was some minerals. Some of the country's oil resources Some countries have more forest, etc. The difference of terrain and climate. As a result, some products can be produced in certain areas only.