Final answer:
Fortississimo, denoted as fff, is a musical term that indicates the piece should be played very loudly. The correct answer is option 1).
Step-by-step explanation:
Fortississimo, denoted as fff, is a dynamic indication in music that means the piece should be performed very loud. It's one of the strongest dynamic marks a musician can see on sheet music. In contrast to other dynamics like piano (p, for soft) or forte (f, for loud), fortississimo signifies a much more intense level of volume, demanding powerful and energetic play from the musician or the ensemble.