What event marked the first National Convention of the FFA?

The founding of the Future Farmers of America (FFA) is the correct choice as it marks the first National Convention of the FFA, which took place in 1928. This event was significant in shaping the future of agricultural education and leadership among American youth. During this convention, the organization's purpose, structure, and events were established, laying the foundation for FFA programs that promote personal, academic, and career success in agriculture.

The formation of the New Farmers of America and the establishment of the Future Farmers of Virginia are important developments in the history of agricultural organizations, but they do not directly correspond to the initial national gathering that initiated the FFA as a national entity. Similarly, while the creation of the FFA constitution is a vital aspect of the organization's development, it is a product of the founding event rather than an event in itself. Thus, the significance of the FFA's founding at the first National Convention is central to understanding the organization's inception and its lasting impact on agriculture education.