Final answer:
The Discovery Degree is the degree created for middle school students by the National FFA Convention to motivate early participation in agricultural education and FFA activities.
Step-by-step explanation:
The degree adopted by delegates at the 72nd National FFA Convention specifically for middle school students is known as the Discovery Degree. This degree is tailored to students in middle school to encourage early involvement in agricultural education and the FFA organization. The Discovery Degree aims to help students develop a strong foundation in the values and opportunities that the FFA offers, setting the stage for future growth within the organization and in their agricultural education.