Do all photos need fore/middle & background?

Not all of them need it but would make a huge difference. The background is the part of the image that is further away from the camera. So by default, the middle ground is that what is in the middle of the foreground and the background.

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 !

-has naturalistic color-has neutral colors-has color harmony-has variations of colors with shading and reflections(charing cross bridge by andré derain; the copper drinking fountain by jean-baptiste-siméon chardin)the copper drinking fountain by jean-baptiste-siméon chardinchardin and derain used color differently in these paintings.which painting has these characteristics? -has fauve color-has monochromatic colors-has intense, unnatural color-has pure color with no shading(charing cross bridge by andré derain; the copper drinking fountain by jean-baptiste-siméon chardin)charing cross bridge by andré derain