Final answer:
Langston Hughes brought recognition to African American singers in the area of opera, which had been lacking before Marian Anderson's breakthrough performance.
Step-by-step explanation:
Langston Hughes, an African American poet, brought recognition to African American singers in the area of opera. Before singer Marian Anderson's breakthrough performance at the Metropolitan Opera in 1955, African American singers had not received recognition in the world of opera. This lack of recognition can be explained by the racial discrimination and segregation that existed at the time. African American singers were often not given opportunities to perform on prestigious stages or were restricted to performing in segregated venues.