PLEASE HELP
A solo photographer has no need to collaborate.

True
False

Both true and false. If the photographer is good at working alone they would tend not to collaborate. But if they aren't they would want to collaborate to get better each day or  to not getting better at all. But if they wanted to get more expirenced then they would most likely go for collaborating with other photographs both better and worse than themselves

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 !