2. Paintings influenced by Greek
and Rome but this time with Christian subjects.

The Paintings that are influenced by Greek and Rome but this time with Christian subjects is the Byzantine art

For better understanding, lets explain what byzantine art means

From the above, we can therefore say that the answer that The Paintings that are influenced by Greek and Rome but this time with Christian subjects is the Byzantine art, is correct

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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 !