Final answer:
Langston Hughes's 1919 long poem subtitled 'A Study of the Negro Race' is titled 'The Negro Speaks of Rivers.' It celebrates African American culture and heritage while acknowledging the struggles faced by the black community.
Step-by-step explanation:
Langston Hughes, an African American poet, wrote a long poem in 1919 that was subtitled 'A Study of the Negro Race.' This poem is titled 'The Negro Speaks of Rivers.' It is an important work of literature that celebrates African American culture and heritage while also acknowledging the struggles faced by the black community. In this poem, Hughes connects African American culture to the ancient and timeless rivers of the world, symbolizing the deep roots and resilience of the black race.