Answer:
Major activities of the Planning Section include: D) Preparing and documenting Incident Action Plans.
Explanation:
The Planning section is responsible for various activities carried out in Incident Command System or ICS. ICS is used to respond to emergencies in the United States. The activities that befall under this section are mostly related to plannings.
These activities are: collecting and evaluating information, preparing and maintaining documents of incidents, etc. Preparing and maintaining the incident documents is an essential task and requires accuracy in representing the facts and figures. Hence, we can say that D is the only activity in the planning section of the ICS.