Answer:
The answer is option A.
Step-by-step explanation:
Foramen magnum is a piece of our anxious system.The spinal string goes through the foramen magnum, to enter the neural trench. Alongside the spinal nerves, certain veins and courses too go through this opening. Anthropologists affirm an immediate connection between upright two-legged strolling and the situation of the foramen magnum, a gap in the base of the skull that transmits the spinal rope. Examination of the skeletons of three bipedal well evolved creatures: an Egyptian jerboa, an eastern dim kangaroo and a human.