This document discusses several genres of rock music: Alternative Rock, Rock, Indie Rock, and Metal. It provides key details about the origins, musical styles, visual aesthetics, and fashion of each genre. Alternative Rock emerged in the 1980s and is similar to Rock but with a distorted guitar sound. Rock originated in the 1950s centered around electric guitar and drums. Indie Rock, which also emerged in the 1980s, is closely associated with Alternative Rock and originated in the UK. Metal features the colors red, black, and white and is associated with skulls, devils, and the sign of the horns hand gesture.