Which word correctly completes the diagram?

The correct answer is Unification. In the 19th century, with the rise of nationalism which believes that loyalty should not be to a king or an empire but to a nation of people who share a common culture and history, and the establishment of common history that indicates a common past and experiences, people which were living in small independent kingdoms in Germany and Italy began to unify and started forming large states based on a common history.

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.