What does the term "alla" denote in music?

The term "alla" in music is an Italian word that translates to "in the manner of." It is used to indicate that a section of music should be played in the style or character that follows this directive. For example, "alla marcia" suggests a march-like style, while "alla breve" refers to a brisk, lively manner. This term helps guide musicians on how to interpret the music in accordance with a specific style or influence, ensuring consistency in performance.

The other options relate to different musical directives, but they do not capture the meaning of "alla." A sudden pause is typically conveyed by terms such as "fermata," gradually speeding up is indicated by "accelerando," and returning to the previous tempo is denoted by "molto," "poco," or "a tempo." Therefore, "in the manner of" is the most fitting interpretation of the term "alla" in the context of music.