Final answer:
The tango is the most popular dance in Argentina, originating in the Buenos Aires dance halls in the 1880s. Developed by the working class, tango reflects the cultural diversity of Argentina and is known for its passionate style.
Step-by-step explanation:
The most popular dance in Argentina is the tango, which began in Argentina itself. The tango emerged in the 1880s in the dance halls of Buenos Aires, developed and popularized by working-class men and women. It embodies a rich history that reflects the cultural melting pot of Argentina, where European and African influences merged with local traditions. Unlike the samba, which is widely associated with Brazil, or flamenco, which has its roots in Spain, tango is quintessentially Argentine. The dance is known for its passionate and sensual movements, representing a blend of cultures and the spirit of the Argentine people.