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You need to do some research about the history of Brazilian abstract art. This will give a better context to your paper.
For example,
https://www.bbc.com/culture/article/20140710-a-year-that-changed-brazilian-art
The Professor also said the artist you wrote about using digital tool to make the art contemporary which is too thin. You need to do some research about the history of Brazilian abstract art and give you a context and substance how to the artist.