What is the author's style in The Bacchae by Euripides?

One of the most unique and recognizable features of the construction of classical Greek tragedies is the use of a chorus. Some historians have speculated that the very origins of Greek tragedy lie in the appearance of the chorus on stage. Before there was actual dialogue and characters in conflict in drama, performances consisted of large groups of men, perhaps as many as fifty, representing each of the various tribes in the hills around Athens, who would gather at festivals honoring Dionysus and dance and sing hymns (or dithyrambs), honoring the god of wine, revelry, and the theatre. After 534 B.C., the year of the first competition for tragedies at the City Dionysia festival in Athens, the role of the chorus began to diminish as the individual characters in the plays became increasingly important.