Final answer:
A Mutual Aid Agreement is an arrangement between agencies or organizations to provide assistance during emergencies, which is crucial for effective incident management.
Step-by-step explanation:
An agency or organization providing personnel, services, or other resources to the agency with direct responsibility for incident management is known as a Mutual Aid Agreement. This is a collaborative effort where various entities come together to provide support during times of emergency or when an incident exceeds the capabilities of a single agency. In contrast, a Command Center is a place from which authority exercises control, an Incident Command System is a standardized approach to the command, control, and coordination of emergency response, and an Emergency Operations Center refers to a centralized location from which a jurisdiction can provide interagency coordination and executive decision-making in support of incident response operations. An example of the difficulties that can arise when coordination fails is highlighted in the response to a natural disaster, where an agency such as FEMA received criticism for its ineffective coordination among other agencies and resources.