Being the first designer of hand axes, stone fire, and other tools, Homo erectus was successfully established in other continents with varying environments.
The Environment may be defined as anything which is present in the surroundings of living organisms.
While making such tools for their use, they need proteins to survive and play their functional role. It leads to the mutation in their protein structure and behavior.
They used fire for cooking, heating their body during winter, and threatening away large predators.
Due to all these inventions, they successfully adapted to three major continents with varying environments.
Therefore, it is well described above.
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