How were jenne sculptures made? what material was most commonly used?

These sculptures from the country of Mali were created sometime between the 13th and 15th centuries.

These sculptures represent warriors dressed in military gear. They are equipped with quivers on their backs and knives strapped to each of their left arms, the horse is equipped with a bridle and ceremonial adornment around its neck [Terracotta]

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 !