Answer:
It showed that U.S.-born children had different head shapes than their immigrant parents.
Explanation:
Franz Uri Boas who lived from the year 1858 to 1942 was a German-born American anthropologist and a pioneer of contemporary anthropology he has also been called the "Father of American Anthropology". His various works is related with the movements known as Cultural Relativism and Historical Particularism.
He was the one that discovered that U.S.-born children had distinct head shapes than their immigrant parents.
