What could have contributed to the formation of bipedal locomotion in human ancestors?

Many factors could contribute to the emergence of bipedal locomotion. First, climate change. The reduction in the area of ​​forests and the emergence of vast treeless territories led to the fact that the ancestors of man began to develop the savannahs. They needed to see prey from afar, as well as notice predators. It is easier to do this while standing on two legs. Secondly, the heating of the body is less in a standing position than on four legs. Thirdly, when walking upright, the front limbs are freed for labor. This gave human ancestors advantages over other species and selection supported those individuals in which upright posture was more pronounced.