Which former governor of Georgia, who was also a member of the Plains FFA Chapter, spoke at the National FFA Convention?

The correct answer is Jimmy Carter, who not only served as the governor of Georgia but was also a dedicated member of the Plains FFA Chapter during his youth. His involvement in FFA exemplified his commitment to agricultural education and leadership. Carter’s address at the National FFA Convention reflects the organization's values and the significant impact that FFA has on shaping future leaders in agriculture. His presence at the convention highlights the importance of FFA in fostering leadership skills and promoting agricultural interests at both national and local levels.

The other options, while notable figures, do not have a direct connection to FFA or to the state of Georgia as an active member in the organization. This makes Carter's participation uniquely relevant and significant in the context of FFA history.