RAP

Rapping (or rhyming, spitting, emceeing, MCing) is a musical form of vocal delivery that incorporates "rhyme, rhythmic speech, and street vernacular" which is performed or chanted in a variety of ways, usually over a backing beat or musical accompaniment.

The components of rap include
Content
That is what is being said in the song.

Flow

That is the style o the way you are rapping at the track.

Delivery

This is the cadence or the tone of the rapper