Question

Music appreciation. Which section of a classical concerto could be improvised? 

Answer 1

The correct option is

C) The Cadenza

Explanation:

A cadenza is a passage of music, contained within the last phrase of a classical work which calls for a soloist or a small ensemble, usually in a "free" rhythmic style, and often allowing virtuosic display. A cadenza usually occurs over the final or penultimate note in a piece, or over the final or penultimate note in an important subsection of a piece.

Answer 2

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.