Final answer:
The inventions that helped Europeans to colonize Africa were the steam engine, telegraph, and firearms.
Step-by-step explanation:
During the European colonization of Africa in the late 19th and early 20th centuries, several inventions played a significant role in facilitating this process. One important invention was the steam engine, which powered steamships and allowed Europeans to travel more easily and quickly to Africa. Another crucial invention was the telegraph, which enhanced communication between European nations and their African colonies. Additionally, firearms like rifles and machine guns gave Europeans a military advantage over local African societies.
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