In this dance, forward and backward cross steps are used in patterns named for a figure-eight shape. An instrument imported from Germany traditionally appears in ensembles (10[1])playing this dance’s music, (-5[1])which often ends in a two-beat “chan-chan” flourish. The name of a piece written for this dance means “by a head.” This dance’s steps are performed in a slow, slow, (10[1])quick, quick, slow pattern. The accordion-like (-5[1])bandoneon was played by a pioneer of this dance’s “new” style, Astor (-5[1])Piazzolla. The composer Carlos Gardel wrote music for this dance that originated in Buenos Aires. (10[1])For 10 points, name this South American partner (-5[1])dance that “it takes two (10[1])to” do. ■END■ (10[3])