One of the functions performed by schools is to promote a sense of national identity and stabilize the political system. this function is referred to as

I believe the answer is: Social integration

Social integration refers to Refers to a principle that see each individuals as a very important member of a large group.
A society with high level social integration would most likely favor the policies that enable them to help the people in needs within their society.

Ifeel like this means that we shouldn't just live for ourselves.also, we should respect others as well as people around us. it reveals that everyone should have equalized freedom, no matter their differences: races, cultures, skin color, etc,. we all deserve the same privileges.