A characteristic motif of Anglo-Saxon art that we see in both metalworking examples, such as the Hinged Shoulder Clasp from the Sutton Hoo ship burial, and manuscript illuminations, such as those from the Book of Durrow and the Book of Kells, is ...

is it ''blue notes? ''

hope i ! you didn't give any options so i hope that was correct! < 3

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 !

12-bar blues chorus = a a b