Answer
Costello's debut album, "My Aim Is True," falls under the genre of punk rock, characterized by its raw, energetic, and rebellious sound. It emerged in the mid-1970s as a reaction against the perceived excesses and commercialism of mainstream rock music. Punk rock bands like Costello's rejected traditional rock conventions and embraced a do-it-yourself ethos, often creating music with limited musical proficiency but with an abundance of passion and urgency.