Question

Order the topics from broadest to narrowest.

Answer 1

This is ordered from broadest to narrowest topics:
American poetry of the early twentieth century
Poetry of the 1920s Harlem Renaissance movment
Langston Hughes's poetry during the Halrem Renaissance 
Langston Hughes's 1925 poem "The Weary Blues"

Answer 2

Broadest being  American poetry of the early twentieth century, poetry of the 1920's Harlem Renaissance movement, Langston Hughes's poetry during the Harlem Renaissance movement, and the narrowest being Langston's poem "The Weary Blue's"