Answer:
I think it means like historical or modern documents that you can use to answer some questions that you have
Explanation:
I think-
Performance threat is a situation in which something is obviously wrong or has the potential to go wrong.
Answer:
The relationship between the 1860 election and the civil war is that because Abarham Lincoln was elected it set off a kind of domino effect in which the southern states did not like that he was elected because they were primarly democratic. Because of this they decided to split off of the United states and create their own country. Lincoln was not going to allow the splitting of the states so the civil war insued as a kind of reunification.
Explanation:
The dictionary has the answer for you:)
