Final answer:
I and V chords played loudly and at a fast tempo are characteristic of Thrash metal rather than Grunge, which is known for its downtuned guitars, slower tempos, and focus on social and personal issues within its lyrics.
Step-by-step explanation:
I and V chords, often played at an intense volume and at a steady, fast beat is characteristic of Thrash metal. This genre is known for its fast tempo, aggression, and often complex guitar work, which is not typically associated with the heavy, downtuned guitars and slower tempos found in grunge. Grunge, notably from the Seattle scene, often featured lyrics that addressed social and personal issues, a punk-rock aesthetic, and a distinctive fashion style including flannel shirts and work boots. It diverged notably in style and attitude from the glamour of Los Angeles-based hard rock. Therefore, the presence of fast, loud I and V chord progressions align more closely with Thrash metal rather than Grunge, Shoegaze, or Alternative rock.