How does the article introduce the idea that Barbara johns was an activist

Barbara Johns was a young African American civil rights activist in the 1950s. She led her fellow students on a strike at their Virginia high school. They were protesting the bad condition of their school compared to the high school for white students. The strike led to a lawsuit that eventually became one of the court cases in Brown v. Board of Education of Topeka. The decision in that case led to the end of segregation (the separation of Black and white people) in public schools.

Explanation:

an interest group is an organization whose members share common concerns, and try to influence government policies that impact those concerns. elected officials frequently complain about the influence of "special interests" on american politics.