Final answer:
Katherine Dunham founded the Negro Dance Group in Chicago, contributing to the Black Arts Movement and fostering a space for cultural expression and celebration within the African American community.
Step-by-step explanation:
Katherine Dunham founded the Negro Dance Group in Chicago. Dunham was an iconic African American dancer, choreographer, and anthropologist, and her group was one of many efforts during the 20th century that contributed to the affirmation and development of African American arts and culture. Her work, along with notable names like Gwendolyn Brooks, and institutions such as the Du Sable Museum of African American Art, played significant roles in the Black Arts Movement, providing spaces where Black stories and cultural experiences could be expressed and celebrated. This movement resonated deeply within the community and played a part in the broader social changes of the time.