Which of the following is not a contribution of land transport to the economic development of any country?

The option that is not a contribution of land transport to the economic development of any country is "depopulation of urban centres." Land transport provides many economic benefits to a country, such as generating income and employment opportunities, as well as diffusing ideas and innovations. However, land transport does not contribute to the depopulation of urban centers. In fact, it can have the opposite effect by making it easier for people to travel to and from urban centers, leading to increased population growth. Therefore, the depopulation of urban centers is not a contribution of land transport to the economic development of any country.