How do rehearsals contribute to an actor's understanding of their character?

Rehearsals are a critical part of the process in theater, significantly enhancing an actor's understanding of their character. They provide a structured environment where actors can delve deep into the nuances of their roles, allowing them to explore various elements such as motivations, emotions, and relationships with other characters. Experimentation during rehearsals enables actors to try out different interpretations, discover what works best for their character portrayal, and receive feedback from directors and their peers. This process of exploration helps in building a more nuanced and multi-dimensional performance.

In contrast, the other options do not emphasize the depth of understanding that rehearsals can provide. Assigning actors to untested roles may expose them to new challenges, but it does not guarantee a greater understanding of their character unless supported by the rehearsal process. Limiting their scope for interpretation runs counter to the creative freedom that rehearsals aim to promote. While memorizing lines efficiently is essential for performance, it is just one aspect of an actor's preparation and does not encompass the comprehensive character exploration that rehearsals facilitate.