What symbol on the FFA emblem signifies that the FFA is a national organization?

The symbol on the FFA emblem that signifies the organization as a national one is the eagle. The eagle represents freedom and ability, and it also symbolizes the FFA’s national scope. It reflects the FFA's commitment to national unity and pride. This connection enhances the organization's identity as a representative body for agricultural education across the United States.

The other symbols serve distinct purposes; for example, corn represents the foundation of agriculture, the plow reflects labor and hard work, and the owl embodies knowledge and wisdom. None of these elements indicate the national nature of the organization as distinctly as the eagle does. The eagle's association with both the American spirit and the expansive reach of the FFA aligns perfectly with the organization's goal to foster leadership and personal growth among its members at a national level.