Final answer:
Collaborative exercises is an effective training method in which CSRs improvise realistic customer scenarios to enhance their problem-solving and communication skills.
Step-by-step explanation:
An effective training method in which CSRs improvise realistic customer scenarios is called collaborative exercises. Collaborative exercises provide an immersive learning experience for CSRs by allowing them to work together and learn from each other as they navigate through realistic customer interactions. These exercises can enhance CSRs' problem-solving skills, communication skills, and ability to handle diverse customer situations.