Passage Between two and three million years ago, several fundamental stages of human development took place: the
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Passage Between two and three million years ago, several fundamental stages of human development took place: the first use of tools, an expansion of diet to include meat, changes in habitat and posture, an increase in brain size, and, finally, the emergence of Homo sapiens
The purpose of the passage is to
explain how larger brains helped humans make and use tools
list important aspects of human development
suggest that tools allowed humans to begin eating
show how posture and habitat affected brain size
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