One factor that contributed to the rise of the sectionalism after tje war of 1812 was

An increase in the number of men voting and/or the concept of Manifest Destiny.
I also found that another factor that contributed to the rise of sectionalism after The War of 1812 was tariffs/taxes placed on goods coming from Northern factories.

It is to persuade someone(make them think it’s is right ) to them understand why it is right