Miriam Schapiro was a Canadian artist based focusing her work as a painter, sculptor, printmaker, and a pioneer of feminist art. According to my research on Schapiro's art, I can say that based on the information provided within the question the term used to describe a shape that suggests the natural world was Organic. In the collage being mentioned the organic shapes can be seen as the flowers and dresses.
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New York City, it is absolutely humongous. To build NYC would be so much work and would make you feel soooo accomplished. The infinite details and people that you would see would be amazing, it would be its own world.