Environmental factors that may have led to the development of early humans in East Africa :
It would need food, water, and shelter.
Overall, the evidence from the environmental and hominin fossil records indicates that hominins emerged during a period of changing environmental conditions. Higher variability resulted from seasonality shifts that caused large-scale environmental swings over periods of time that were frequently thousands or even tens of thousands of years long.
There are numerous theories regarding how the environment has influenced human evolution. The savanna hypothesis is a perspective that holds that some adaptations, such as upright walking or tool-making, were connected to drier habitats and the development of grasslands.
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