Complex sentence: Her acting style was characterized by clear diction and economy of gesture, and represented a major change from the exaggerated style of those days, as society was beginning to demand the highly emotional, realistic, instinctual acting styles of the Romantics.
Split into simpler sentences: Her acting style was characterized by clear diction and economy of gesture, and represented a major change from the exaggerated style of those days. Society was beginning to demand the highly emotional, realistic, instinctual acting styles of the Romantics.