The super family of primates.The hominids have the advantage of bipedalism. This is so because it will allow them to move and hold the objects at the same time.
The legs help the hominoids to walk and the hands helped them to hold the objects.
This is how the bipedalism helps in the living and survival of the hominoids.
D. Think about other animals... even when they have opposable thumbs, they can't move and hold at the same time. We can RUN and hold food or weapons at the same time.
