Read the passage below carefully:
'For centuries, fonio—a nutrient-rich, drought-resistant cereal crop native to the West African Sahel—was relegated to marginal land and often dismissed as a secondary food source. However, as erratic rainfall patterns and prolonged dry spells increasingly jeopardize staple crops like maize and rice across West Africa, agronomists are urging a return to indigenous grains. Fonio matures rapidly within six to eight weeks, requires minimal fertilizer, and thrives in poor, sandy soils where conventional crops fail. In countries such as Guinea, Mali, and Burkina Faso, local farming cooperatives have begun adopting mechanized processing equipment to eliminate the arduous traditional hand-pounding method that previously limited large-scale production. Despite these technological improvements and growing urban demand for gluten-free grains, funding for fonio research remains significantly lower than that allocated to imported cereals. Experts argue that prioritizing investment in local grain supply chains is essential for long-term food security across the region.'
Match each statement from the text on the left with its structural role in the passage on the right.
- Prioritizing investment in local grain supply chains like fonio is essential for regional food security.Core thesis / Essential central argument
- Fonio matures rapidly within six to eight weeks and thrives in poor, sandy soils with minimal fertilizer.Supporting agronomic evidence
- Cooperatives in Guinea, Mali, and Burkina Faso are adopting mechanized processing equipment.Specific illustrative example
- There is a growing urban demand for gluten-free grains.Secondary background detail