What might be an artists’ motivation for creating artworks about genealogy?

-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

i got this answer from a really friend, and it was right.

hope this you like it me and a special to that dude!

artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.