Question

hip hop music was invented in the south bronx in new york city.
it spread around the world.
unless because although ← joining words
proofread your work. check your capitalization.
although hip hop music was invented in the south bronx in new york city, it spread around the world.

Explanation:

1. First, correct the capitalization of "city" to "City" as "New York City" is a proper noun.
2. Also, the logical relationship between the two sentences: "Hip hop was invented in South Bronx" and "it spread around the world" is a contrast, so "although" is the correct joining word. The corrected sentence should be: "Although hip hop music was invented in the South Bronx in New York City, it spread around the world."

Answer:

Although hip hop music was invented in the South Bronx in New York City, it spread around the world.