Question

foreign trade has been the main channel connecting countries explain

Answer 1

Here is your answer.
Trade was the main channelwhich connected the countries in the past. ... Foreign investment is just limited to the inward flow of capital, while foreign trade is about flow of goods. In recent years China has beenimporting steel from India.
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Answer 2

Yaa nowadays foreign trade is the main thing which came and many countries get to trade and be united Basis of International Trade. A country specializes in a specific commodity due to mobility, productivity and other endowments of economic resources. This stimulates a country to go for international trade. The basis of international trade lies in the diversity of economic resources in different countries.