The Article says:
New York. Detroit. Hip-hop's hot in big cities like these. But guess what? Native American reservations have become hip-hop hot spots, too.
This passage helps the reader to know that __________.
hip hop first took off on Native American reservations
the hip-hop music made in different places sounds the same
people like hip-hop in places other than big cities
hip-hop is no longer made in cities like New York and Detroit