Question

why is the means of transport called the lifelines of nations economy

Answer 1

The means of transportation and communication are called the lifelinesof a nation and its economy because they are the preconditions for progress and development. A country makes tremendous progress because of its developed means of transport and communication.

Answer 2

Because it helps in transportation of goods,raw materials as well as finished products etc.
It also gives employment and helps in eradication of poverty and unemployment.
It also make easy for international trade which is the back bone of country's economy
It also brings Foreign exchange.
Hope it helps