I can't tell what piece of artwork you are referring to, however, I can explain the art criticism approach that I have used in art school. I believe this is how you assess a piece of artwork using the art criticism approach:
There are usually four steps in analyzing artwork and they are as follows:
Description is more about the visuals. Such as, what do you actually see in the piece of artwork? This can be as simple as being able to identify objects, people or symbols.
Analysis is working off what you saw in the description. This is thinking along the lines of, why did the artist put that certain object/person/symbol there? Does it allow for more dynamics of the picture, or could the artist have done something better?
Interpretation is determining the meaning of putting a certain person/object/color/symbol where they put it. What might it mean? What is the artist trying to portray?
Lastly judgement would be looking at the overall significance of the artwork. What might it mean to viewers and why might that be important?
I sincerely hope this was able to help you!
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