Answer:
1. primary sources are artifact, document, diary, manuscript, autobiography, ext. a secondary source are book review, encyclopedia and stuff like that.
3. You have to round up your data and see what the final out come of the research is.
Sorry but i dont know the others to well. But hope i still helped! :)
Explanation:
Without food people would all have to go back to raising their own farms and could not support cities and without money coming in and out through the cities economy would start to collapse. No society can live without an economy so then society would fall. Also if people did stay in the cities without food supply they would die of starvation and without people there can be no society. Stable food supply is necessary for society to survive.
Germany was similar to Italy because revolutionaries in Germany and Italy called for unification