This depends entirely on the research project in question. For instance, if you want to learn more about how the memorial was constructed, you could look at the history of its architecture, etc. Or if you want to know more about how it was conceived you should look at the debates surrounding it's creation.
Answer:
Carthage was located in North Africa
Explanation:
If you are talking about the time around slavery then, the north wanted to wourk out diffrences because they didnt want slavery but didnt want war either
Answer:
Because they believed that Earth was the center of the universe
Explanation:
The king feared losing power to nobles, members of the third estate saw it as a chance to raise taxes on the 1st and 2nd estates.