<span>The optimal incident command structure would be the unified command structure. This structure implements an Incident Command System (ICS) that can be used across the board into different districts and regions. This would be the most efficient way to follow through after a disaster of this type.</span>
If you are trying to match a term with that definition I think you answer would be bureaucracy (<span>a system of government in which most of the important decisions are taken by state officials rather than by elected representatives)</span>
The used there engineering skills to control water flow to bring fresh water in
Deductive reasoning is also referred to as top-down reasoning, because it starts at the "top" with the more general understandings, working "down" to specific conclusions.