Bipedalism and tool use were very important in the evolution of human ancestors. Bipedalism led to faster, more efficient travel, and eventually led to hand dominance. Tool use evolved into modern civilization, and made it easier to cut up food and do other hard jobs. Bipedalism helped human ancestors run faster and more efficiently, and tool usage helped modern civilization evolve into what it is today; without these, modern civilization never would have evolved into what it is today.
Bipedalism helped human ancestors in many ways. One of those ways was the it let them see farther in the savannah. When human ancestors started moving out of the jungles and into the savannahs, they needed to be able to see far off into the distance. They started standing up on their back legs, which eventually led to normally walking on 2 legs, AKA bipedalism. Bipedalism also helped human ancestors travel faster and more efficiently. Walking on four legs required more energy and burned more calories than walking on two feet, which allowed for faster and longer travel. Bipedalism had many benefits to it.
Tool use was arguably even more important than bipedalism. Tools made foraging easier for those who still did it, making it easier to kill the animal and cut it up, and also made agriculture easier,
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The question is: which one was more important? Bipedalism offered many benefits including faster and more efficient travel, being able to see father, among others, while tool use eventually evolved into modern technology, contributed to specialization of labor, and allowed for more brain development. Bipedalism was more important because it started the natural selection of the human species. When human ancestors began to transition from jungle and forest to savannas, they needed to be able to run quickly, as well as more efficiently, and be able to see far distances to spot predators before they