How did an increase in trade lead to the growth of towns and cities in the middle ages?

The trade helped people tink of new ways to make a living and they would eventually decide to build new houses with the newly earned money. As an after affect then other houses would spring up like a domino effect. Eventually there would be a new town.

a. a party in a lower-court case requests that the supreme court overturn the other court’s ruling in the case.