Look around you and write down about someone you know that you think will be a memorable character in a play. Write down details about this person, as you would when you write a play. Does this character give you an idea for the plot of a one act play? If yes, what would the plot for your play be? If no, why not?

you need to use one of your friend or family members kid

Explanation:

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 !