Yellow journalism is basically people exaggerating. In simpler words, it is a newspaper (such and such) that contains no real information behind the story that is being given to the person reading it. Nowadays, the Internet can be an example of yellow journalism. People post things that are not true or have no evidence behind it. The summary is, is that yellow journalism is something where journalists say/write/do to trick people into thinking a certain story is true without any real facts.
I believe this would be segreation.
This is a very sad thing that went on and can still continue to go on when the whites were segregated from the blacks.
hope this helps!