Final answer:
Stage machinery is the term used to describe the scenic elements that accompany and support the dramatic action in theater. These elements can include turntables, elevators, hoists, rolling carts, and wagons. Stage machinery has been used throughout history and continues to be used in modern theaters.
Step-by-step explanation:
The scenic elements used to accompany and support the dramatic action in theater are collectively called stage machinery. These elements include turntables, elevators, hoists, rolling carts, and wagons. Stage machinery has been used throughout history in various forms, from the Greeks and Romans using wagons and cranes, to modern theaters utilizing motorized systems.