Question

explain me this and I will mark brainliest

Answer 1

dense and efficient network of transport and communication is necessary as there will be a simple relation with trade growth. the business grows and develops. supply of goods will be easy.
international trade is considered as it increases countries GDP. it will detect a developing country. it also maintain external relationships.
hence it is called country barometer.
hope it helps.

Answer 2

It is because the dense network provides better communication without any interference between one to another.
And it is considered because an advancement of International Trade is an index of economic prosperity for a country.