Tools are evidence of cultural evolution and capacity for language and there by capacity for culture.Large brain and bipedalism allowed the increasing of tool specialization and other development such as artwork,ornamentation,cloth making and shaping.
As the digits in our hand are straight, thumb is opposable and long, we can make a finer grip than the others which helps mainly in tool making.
Language is the medium of culture. We have well developed language areas called Broca's and Wernicke's areas.As our bodies evolved for speech ,the voice box dropped lower in the throat.the area above the vocal cord lengthened enables us to make a wide variety of sound.
We have skull characteristics such as high forehead,rounded skull,no brow ridges, chin and small teeth,which are the characteristics of human skull.We have a S-shaped vertebral column,bowl shaped pelvis and arched structure of foot.Large toe of our foot is aligned with other digits.These features are mainly associated with bipedalism and upright posture.