Answer:
sectionalism - concern for one's region over concern for the entire nation
popular sovereignty - the idea that people should be able to vote on important issues
nullify - to invalidate something or make it null and void
states' rights - the idea that states should hold the most political power
Explanation:
Sectionalism can be seen the most when we have certain quarrels between certain regions.
The best example of popular sovereignty was when the new states were choosing whether to enter in the Union as a free state or with allowance of slavery.
In general when we are nullifying something, we are actually making it without value.
States' rights is the doctrine according to which government should have the supreme authority.
