The song entitled Swing Low, Sweet Chariot is an example of a

Swing Low, Sweet Chariot is one of the most well-known examples of a negro spiritual (also called African American spiritual). Negro spirituals are religious folk songs that originated among enslaved African Americans in the United States, primarily during the 18th and 19th centuries. They blend African musical traditions with Christian hymn texts and served as expressions of faith, suffering, hope, and, in some cases, coded messages about escape from slavery.

Swing Low, Sweet Chariot references the biblical story of the prophet Elijah being taken to heaven in a chariot of fire (2 Kings 2:11). Its lyrics express a longing for deliverance and heavenly rest. The song was first publicly performed by the Fisk Jubilee Singers in the 1870s, which helped bring negro spirituals to international attention.

The other options are all secular dance forms: a tango is an Argentine partner dance in duple metre; a cha-cha-cha is a Cuban dance derived from the mambo; and a bolero is a slow Latin dance of Spanish or Cuban origin. None of these is a religious vocal genre.