Do you know that  hip-hop or rap music, is a music genre developed in the United States by inner-city African Americans in the 1970s ?
Indeed I do.  I'm a hip hop artist myself.  Most people would never know though.
Fantastic, then you are already familiar with the fact that it consist of MCing/rapping, DJing/scratching with turntables, break dancing, and graffiti writing.
Don't forget writing.  Although I imagine a lot of artists have other people write for them.
Ah, thats right!, "hip hop" more properly denotes the practice of the entire subculture.
I believe hip hop also has roots that go further back than the 1970's.  Hip Hop comes from chants of the slaves in the fields in the south originally.
Oh no, it had nothing to do with slavery hahah. Hip Hop as a genre and as a culture was formed during the 1970s when block parties became increasingly popular in New York City, particularly among African-American youth