Final answer:
The Federal-Provincial controversy during the Boer War was caused by conflicts over control of South Africa's mineral resources, the desire for Boer independence, and the support from Germany.
Step-by-step explanation:
The Federal-Provincial controversy during the Boer War can be attributed to various factors. The Boer Wars were fought between the British and the Dutch-based Boers over control of South Africa's mineral resources. The Boers wanted to maintain their independence, while the British sought to establish their dominance in the region. Additionally, the Boers received support from Germany, further straining the relationship between Britain and Germany. These tensions and conflicting interests led to the Federal-Provincial controversy during the Boer War.