When responsibilities of responders overlap, what type of command may be employed so that different agency representatives work together on one plan?

Unified command is the correct answer because it provides a structure for managing incidents that involve multiple agencies or organizations. When responders from different jurisdictions or specialties need to work together, unified command allows for a coordinated effort to develop a single incident action plan that addresses the needs of all parties involved.

This approach is particularly vital in complex incidents where multiple agencies may have different operational protocols and jurisdictions. By establishing unified command, all representatives can share responsibilities, resources, and information, ensuring that operations are streamlined and that there's a mutual understanding of objectives, strategies, and operational procedures.

This configuration enhances communication and cooperation, leading to more effective incident management, reducing the potential for conflict or confusion that might arise if each agency operated independently under its own command. It allows individuals and teams to leverage their strengths while contributing to a common goal.

In contrast, other command types may not foster the necessary collaboration among different agencies, highlighting why unified command is specifically designed for scenarios where overlap occurs.