Question

hip hop music was invented in the south bronx in new york city.
it spread around the world.
unless because although ← joining words
combine the sentences into one sentence. use one of the joining words.

Explanation:

We need to combine the two sentences using a suitable joining word. Let's analyze the relationship between the two sentences. The first sentence is about the origin of hip - hop music, and the second is about its spread. The word "although" can be used to show a contrast or a non - causal relationship between the local origin and the global spread. So we can form the sentence: 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.