The song dynasty promoted trade

across the gobi desert.
down the mekong river.
along the silk road.
on the great wall.

The Song Dynasty promoted trade along the Silk Road. The correct option among all the options that are given in the question is the third option or the penultimate option. The other choices are incorrect and can be neglected. I hope that this is the answer that has actually come to your great help.

The economics south america are similar because they have a lot of production and selling similar to wat