The brain of early man developed and it helped him to use his intelligence in making tools.
The correct option is A True
Life on the ground resulted in biological changes. The apes' daily exercise of climbing trees had already developed the bones of their wrists and accustomed their 'hands' to grasping things. With the passage of time, the hand developed flexible fingers. This new development made the ape man a craftsman. He could now grasp things and bring them closer to his eyes. Side by side, the position of the internal organs of the
body also changed to suit the erect posture. The brain developed and helped him to use his intelligence in fashioning tools and, lastly
in rising above the other animals