Final answer:
Leopold II's occupation of the Congo sparked the Berlin Conference to address the scramble for Africa.
Step-by-step explanation:
The event that sparked the Berlin Conference was Leopold II's occupation of the Congo. Leopold II, the king of Belgium, claimed the territory and exploited its resources for personal gain, including rubber and ivory, leading to international concern about the treatment of the Congolese people. The conference was called to address the scramble for Africa and to establish rules for the colonization of Africa by European powers.
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