Final answer:
E-mail continuation of therapy is most suitable for clients who would be harmed by early termination, ensuring ongoing support and stable therapeutic relationships.
Step-by-step explanation:
Continuing the therapeutic relationship through e-mail with clients when a social worker is moving temporarily to another city is most appropriate for clients who would be harmed by early termination of their therapy. The alternative of maintaining contact via e-mail is beneficial for those who have developed a dependency on the therapeutic relationship for their ongoing wellbeing and for whom abrupt termination could cause significant distress. For instance, case studies in community psychology suggest that maintaining communication channels is crucial for providing consistent support. Additionally, such approaches help in managing virtual relationships, a common practice in current community psychology work according to recent literature.