Limited government sorry if wrong
Slavery played the central role during the American Civil War. The primary catalyst for secession was slavery, especially Southern political leaders' resistance to attempts by Northern antislavery political forces to block the expansion of slavery into the western territories.
The Constitution lays the framework for individual rights in the first ten amendments of the Constitution (also known as the Bill of Rights).
In the Bill of Rights, US citizens are guaranteed a significant amount of rights. This includes the freedom of speech, freedom of religion, right to bear arms, right to a jury trial, and freedom of press (to name a few). These are constitutional rights that citizens will have as long as the Constitution remains in use.
The Constitution of the US also creates a balanced government. This is thanks to the three branches of government. This includes the legislative, judicial, and executive branches. All three of these branches have different roles. Along with this, each branch has the ability to check each others power. This ensures that no one part of our government will be too strong.
"c. A narrative source" is what a historian would use to get a firsthand account of a past event, since in these sources (which are also primary sources) a person is giving a first-hand account of the event itself.