The spontaneous creation or variation on established theme within an artistic work is known as

Improvisation

Explanation:

Improvisation is any activity being done without any kind of preparation or plan and it can be applied to any field inside and outside the arts.

the answer is slaves

douglas was a slave who turned into a statesman and he refused to celebrate the 4th of july until all slaves were emancipated or set free.

original oratory is a competitive event in the national speech and debate association, stoa usa, national catholic forensic league, and other high school forensic competitions in which competitors deliver an original speech on a subject of their choosing, though the speech must be factual.racial discrimination refers to discrimination against individuals on the basis of their race. policies of racial segregation may formalize it, but it is also often exerted without being legalized and also it means facing injustice.