I think after over all I'm not in high school so srry
The answer is gait.
Definition of gait : a person's manner of walking
It means chief, or princapal
Idea: Income Gap, it will be about Economic inequality the demographic of people who experience economic inequality will be most interested in results like women and minorities, the purpose of my blog is to shed light on the injustice of someone being discriminated against financially due to race, gender, social status because it violates constitution rights!
that is one of the problems in this world
I think the sentence that uses it correctly is the last one.