Answer:
Organic
Explanation:
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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The amount of vinegar is the amount of mayo divided by 2. therefore the answer is 8 teaspoons of vinegar.
If it were the other way around and you knew the amount of vinegar and needed to find out the amount of mayo, you would multiply the vinegar by 2