Hip hop emerged as a reaction to the gang culture and violence of the South Bronx in the 1970s, and daily experiences of poverty, racism, exclusion, crime, violence, and neglect. It necessarily embodies and values resilience, understanding, community and social justice.
That would be a minor 3rd as D (in the key of D major anyway) is the root or tonic, and F is the 3rd(minor).
It is known as "Thematic Development".
Well, the Fifth Symphony kinda sounds like someone knocking quickly and repeatedly...
