Answer:
Beauford Delaney was the connection between Marian Anderson and Georgia O'Keeffe.
Step-by-step explanation:
Marian Anderson was a famous black singer, much appreciated during the Harlem revival and among the black population. She became very famous because of her talent and what she represented, being admired by Beauford Delaney, a very influential artist from Harlem who made several paintings of her, in a very expressive and artistic way. These paintings caught the attention of Georgia O'keeffe, another artist, who saw in Delaney's illustrations, something very promising and beautiful.