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 playing this dance’s music, which often ends in a (-5[1])two-beat “chan-chan” flourish. (-5[1])The name of a piece written for this dance means “by a head.” This dance’s steps (-5[1])are performed in a slow, slow, quick, quick, slow pattern. (-5[1])The accordion-like (-5[1])bandoneon was played by a pioneer of this dance’s “new” style, Astor Piazzolla. The composer (10[1])Carlos (10[1]-5[1])Gardel wrote music for this dance that originated in Buenos Aires. For 10 points, name this South American partner dance that “it (10[1])takes two to” do. (10[1])■END■ (10[3])