The document discusses 5 topics: 1) How Metallica's song "One" shows a serious side of heavy metal through its musical elements and lyrical content. 2) How Run-D.M.C.'s "Rock Box" fused rock guitar and hip hop beats to create their signature crossover sound and influenced later rap and hip hop artists. 3) How Nirvana's "Smells Like Teen Spirit" signaled the emergence of the grunge style through its sound and vocal delivery of lyrics, and how it compares to alternative rock contemporaries. 4) Whether labeling music as "pornographic" and linking it to antisocial behavior constitutes a direct attack on freedom