Final answer:
The implementation of the incident action plan is accomplished by performing ICS duties.
Step-by-step explanation:
The subject of this question is Social Studies. The question is asking about the implementation of the incident action plan. The incident action plan is typically associated with emergency management and response, which falls under the realm of social studies.
The correct answer to the question is A. ICS duties. ICS (Incident Command System) is a standardized approach used by emergency management organizations to manage incidents effectively. The ICS duties include tasks such as coordinating and supervising the response, communicating with team members, and ensuring that objectives are met.
The answer options B, C, and D are not directly related to the implementation of the incident action plan in the context of emergency management.