Final answer:
The mayor-council system is not a form of county government, and Transformation is not one of the four pillars of food security.
Step-by-step explanation:
Forms of County Government
Among the options given, C. the mayor-council system is not one of the three forms of county government. The three forms commonly recognized in the United States are the commission system, the council-elected executive system, and the council-administrator system. The mayor-council system is typically used in city governments, not county governments.
Four Pillars of Food Security
The option that is not one of the four pillars of food security is D. Transformation. The four pillars of food security are defined as availability, access, utilization, and stability. Transformation does not fall under the recognized pillars of food security.