During the festival, in the following scenes of Dongfanghong Square in Xiangtan, chemical changes are accompanied by () A. Colorful flags are displayed B. Fine wine is fragrant C. Music is melodious D. Flame. A, bunting, or bunting, there is no new substance generated, which is not a chemical change, so the option is wrong;

B, alcohol molecules are constantly transported, and no new substances are generated, which belongs to physical changes, so the options are wrong;

C, the music is melodious, there is no new material generation, nor is it a chemical change, so the option is wrong;

D, when burning fireworks, generate new substances, belongs to the chemical change, the option is correct;

So choose d