Final answer:
The subject of this question is Social Studies as it pertains to FEMA and its coordination of regional response in the United States.
Step-by-step explanation:
The subject of this question is Social Studies as it pertains to the Federal Emergency Management Agency (FEMA) and its coordination of regional response in the United States.
Regional Response Coordination Centre's (RRCCs) operate under the direction of the FEMA Regional Administrator and are responsible for coordinating the Federal regional response. The coordination by RRCCs continues until a Joint Field Office (JFO) is established. The establishment of the JFO marks the transition of response coordination from the RRCC to the JFO, which becomes responsible for the ongoing coordination of federal support.