This question is based on General Literary Principles. The three main unities in drama are those of

The three main unities in drama are those of action, time, and place. The unity of action refers to the idea that a play should have one main plotline that is unified and cohesive. All of the elements of the play, such as characters and themes, should be related to and serve this main plotline. The unity of time refers to the idea that a play should take place within a single day or, at most, a few consecutive days. This means that the events of the play should be presented in a condensed and focused way, without any unnecessary or extraneous elements. The unity of place refers to the idea that a play should take place in a single location. This location should be consistent throughout the play, without any unnecessary changes or shifts in setting. Taken together, these three unities help to create a sense of coherence and focus in a play. They are particularly associated with classical Greek drama, but have been influential in the development of Western drama more broadly.