Final answer:
The European interest in colonizing Africa was greatly increased by the discovery of diamonds and gold.
Step-by-step explanation:
The European interest in colonizing Africa was greatly increased by the discovery of diamonds and gold. These valuable resources were found in abundance in various regions of Africa, attracting Europeans who saw an opportunity for wealth and power. The exploitation of diamonds and gold played a significant role in the colonization and partition of Africa by European powers during the late 19th and early 20th centuries.
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