Answer:
Without the context of the excerpt in question, it is difficult to determine which of the options are present at the beginning of the middle section of the movement. However, based on the provided options:
Use of arpeggios: This may or may not be present at the beginning of the middle section, depending on the specific musical composition in question.
Quiet volume: This may be present at the beginning of the middle section, as a contrast to the dynamics of the preceding or subsequent sections.
Idea in dialogue: Again, this may or may not be present at the beginning of the middle section, as it depends on the musical composition and its specific structure.
Therefore, it is not possible to provide a definitive answer to this question without additional context or information about the excerpt being referred to.