In which Gothic cathedral were flying buttresses used for the first time? A.
Chartres Cathedral

B.
Salisbury Cathedral

C.
Notre Dame

The flying buttresses of Notre Dame de Paris, constructed in 1180, were among the earliest to be used in a Gothic cathedral.

Explanation:

Just took the test person above me was right :) C. Notre Dame

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 !