Vinegar and oil have very different molecules that are always attracted to the species itself. And how can we gather water and oil and make something delicious like vinaigrette or mayonnaise sauce?
We need an emulsifier!
Emulsifiers are capable of making two totally different entities live together harmoniously. They are substances capable of making emulsions (a mixture of two immiscible liquids, "which do not mix", such as water and oil) stable and homogeneous.
The most common emulsifiers used in sauces are mustard, garlic, tomato extract, egg yolks and sour cream.
Value in art is essentially how light or dark something is on a scale of white to black (with white being the highest value and black being the lowest value). It is widely considered to be one of the most important variables to the success of a painting, even more so than your selection of color (hue).
It has lots of shades that can tell you exactly what and where this woman is. The shades tell you that its night and there's a wine bottle so maybe the woman just got out of a relationship or had a bad day.
