1. What is the difference between the music from 0:03-0:10 and 1:45-1:52? 2. If the repeat of the first theme starts at 1:53, and the repeat of the second theme starts at 2:37, what theme is Mozart developing from 3:37 - 4:00? 3. What part of the piece (Exposition, Development, Recapitulation) do you hear at 4:06?

1. There is no difference between the music from 0:03-0:10 and 1:45-1:52

2. The second theme.

3. At 4:06 we hear the recapitulation.

Explanation:

1. They are all the opening introduction.

2. If the repeat of the first theme starts at 1:53, and the repeat of the second theme starts at 2:37, Mozart is developing the second theme from 3:37 - 4:00

3. The part of the piece we hear at 4:06 is the recapitulation.

i'm not sure i completely understand your question, but i will do my best.

i think the answer you are looking for is sequence. (see below)

a repeated melodic fragment would be best defined as repetition, while repeated chords (different or the same) could be a chord progression. however, you then mentioned the chord and melodic fragment beginning on higher or lower pitches, in that case, the answer could be best defined as a sequence. the definition of a sequence is as follows: "the restatement of a motif or longer melodic (or harmonic) passage at a higher or lower pitch in the same voice."

let me know if this !