I give brainiline if croect The different values used on the subject of this painting show

a the direction of a light source

b the direction of rhythm

c pattern and chiaroscuro

d pattern and sfumato

I am pretty sure it's a. direction of light source

Explanation:

in the pictire it shows a person standing over a table with the light filtering in from the window. That would be a source of light and the direction it is coming from is the window. I hope this helps and I wish u the best of luck on your quiz/test.

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explanation:

answermicrotones;