Please help ME What role does dualism have in the philosophy of Confucianism?

It calls for a balance between each part of nature.
It causes conflict between dark and light elements of nature.
It shows how people prefer peace and harmony over conflict.
It calls for victory of the bright side of nature over the dark side.

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal