Which term represents a performance 'with fire'?

The term that represents a performance "with fire" is indeed "con fuoco." In musical terminology, "con fuoco" is an instruction to perform a passage with intensity, passion, and fervor, effectively conveying a sense of excitement and energy, much like fire. This term encourages musicians to infuse their playing with an emotional quality that reflects the dynamic and vivid character of the music.

In contrast, the other options convey different nuances. "Con brio" means to play with vivacity or spirit, emphasizing liveliness but not necessarily the intense passion implied by "con fuoco." "Con grazia" suggests a performance that is graceful and elegant, focusing more on fluidity than energy. "Con moto" indicates a performance that is moving with motion or tempo but lacks the fiery intensity associated with "con fuoco." Each of these terms highlights different characteristics of musical performance, but it is "con fuoco" that specifically captures the essence of playing with fire.