Concept:The Sokoto Caliphate inspired several Islamic reformers in West Africa, including Seku Amadu in Masina.Explanation:Seku Amadu founded a theocratic state in Masina in the early 19th century.He modelled his government on the Sokoto Caliphate’s Islamic principles of rule.His aim was to reform Islam in the region and establish strict Islamic law.This distinguishes him from leaders like Al-Hajj Umar, Ahmadou Sekou, and Samori Ture.Answer:D. Seku Amadu