Why is nationalism a useful concept in the world?

"Nationalism is a belief, creed or political ideology that involves an individual identifying with, or becoming attached to, one's nation."

Hope this helps!

Explanation:

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.