What does "attacca" instruct the musician to do?

The term "attacca" is an Italian musical instruction that directs musicians to proceed immediately into the next section of music without pausing or taking a break. It is often used at the end of a movement or section to create a seamless transition into what follows, enhancing the flow and continuity of the performance. This technique can be particularly effective in larger compositions, where maintaining momentum is important for the overall structure and emotional impact.

In contrast, the other options refer to different musical commands or interpretations that do not align with the meaning of "attacca." For instance, slowing down, playing with emotion, or repeating a measure would introduce a halt or alteration in the flow, which is contrary to the intent of an "attacca" marking. The emphasis on an immediate, uninterrupted continuation is what defines the correct interpretation in this context.