Final answer:
The question describes a scenario that does not correspond to a specific known play, and without context, it is not possible to provide definitive answers. Theatric conventions can vary and character movements such as stepping forward usually indicate a shift in focus, but without the actual script, we cannot determine the character's actions or intent.
Step-by-step explanation:
It appears there might be some confusion regarding the requested scene. The description provided does not correspond to a specific known play and seems generic, implying it might be from an unnamed script or a hypothetical scenario. As per standard stage directions, actor movements are often described from their own perspective, facing the audience. Therefore, when Kim and the last two girls move to the left, it is from their point of view, which means they move to Stage Left. Without details of the specific play and scene, it is impossible to answer the student's question definitively as to who steps forward or where the characters go.
However, according to conventional narrative patterns and stage practices, if a character moves away and another character steps forward, this often shifts the focus to the individual stepping forward, possibly for a monologue or to begin a new action sequence.
Remembering that playwrights use stage directions to visualize the character movements and how a play's ending can impact the audience, as demonstrated in the controversial ending of Ibsen's play and the structure of Diana Son's Stop Kiss, without specific details about the script in question, we cannot provide precise answers to the scenarios described. Stage directions play a crucial role, but without the context of the specific play, we cannot give the definitive actions or intentions behind the characters' movements.