The concept of "tres unidades," also known as three unities, refers to three principles followed in classical theater - unity of action (the plot should have one central theme), unity of time (the events should take place within 24 hours), and unity of place (the action should occur in one location).
Trama: "Trama" refers to the plot or storyline of a play or literary work.
Tiempo Dramático: "Tiempo dramático" represents the passage of time within a play, which may differ from real-time.
Espacio Escénico: "Espacio escénico" refers to the physical space on stage where actors perform. It includes set design, props, and other elements that contribute to creating a specific environment.