Which of the following was an adaptation that evolved in connection with human upright walking?

Question

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Spinal and pelvic anatomy have evolved in connection with human upright walking, as the spine must support the weight of the head and allow for balance while walking, and the pelvis has been reshaped to support the internal organs and provide a stable foundation for the legs. Hair, opposable thumbs, stereoscopic vision, and color vision are not directly related to upright walking.

Which of the Following Was an Adaptation That Evolved in Connection