Which city in Michigan is famous for its contributions to the Motown music genre?

Detroit is renowned for its pivotal role in the Motown music genre, which emerged in the late 1950s and dominated the musical landscape throughout the 1960s. Motown Records, founded by Berry Gordy Jr. in Detroit, became the launchpad for iconic artists such as Marvin Gaye, Diana Ross and The Supremes, Stevie Wonder, and the Jackson 5. The city's rich cultural heritage, along with its urban landscape, provided the perfect backdrop for the development of this influential musical style, which blended rhythm and blues with pop sensibilities, transforming the music industry.

The other cities, while they each have their own unique contributions to Michigan's culture and music scene, do not hold the same historic association with Motown. Ann Arbor is well-known for its vibrant arts and college-town atmosphere, but it is not specifically tied to Motown. Lansing, as the state capital, has its significance in politics and governance rather than music. Grand Rapids has a burgeoning music scene but also does not have the historical connections to Motown that Detroit possesses. Hence, Detroit is celebrated as the birthplace and heart of the Motown movement, making it the correct answer.