As trade means increase in production to send the traded things they have to communicate with with the people who are well known about production to increase there trade.
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Today, world has become a global village due to the developed means of transport due to which trade occurs...
Transport has been able to acheive due to the developed means of communication system..
Therefore, trade and communication are complementary to each other..
Today, India is well- linked with the rest of the world through trade and communication.

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hope this heps.. mark as best pls....
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