They are known as stage directions for plays and other theater arts
Are there any answer choices?
A group of two or more scenes that form a major division of a play is an act
Definitely not C because then your essay will not be as specific and your ideas won't be as clear.
I don't think the answer is D because you want to explain yourself thoroughly
I think that the answer is B....but it could also be A
I'd go with B though <span />