Final answer:
Gershwin's Porgy and Bess is an opera that combines classical music, American jazz, and folk music to tell the story of African-American communities in the early 20th century.
Step-by-step explanation:
Gershwin's Porgy and Bess is best described as an opera that combines elements of classical music with American jazz and folk music. It tells the story of the African-American communities in the early 20th century, addressing themes of poverty, racial inequality, and love.
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