The lightness and darkness in tones and color.
Joke:
who let the dogs out? ruff ruff ruff
If im correct it would be B. Sacred, hope i could help out.
Answer:
yes, join my discord server and add me discord. gg 2FqSnYEsP
(I added spaces bc of automod)
Explanation:
A traditional portrait is usually on a canvas backdrop with a three or four light set up, main, fill, background and hair light.