Music appreciation. which section of a classical concerto could be improvised?                 a.  the modulation      b.  the prelude      c.  the cadenza      d.  the development

I would say the correct answer is C. the cadenza.
Cadenza is defined as "an improvised or written-out ornamental passage played or sung by a soloist or soloists,' so you can see that the important part of the cadenza is that it is improvised. It is used to show the skill of the performer.

The answer is ink because it has to soke in the paper so i believe the answer is b.ink