Medulla oblongata is the part of the hindbrain which connects the brain with the spinal cord. The part of the brain serves various functions. Sensory and motor neurons (nerve cells) from the forebrain and midbrain travel through the medulla. The medulla oblongata helps in regulation of breathing, heart and blood vessel function, digestion, sneezing, and swallowing. This part of the brain is a center for respiration and circulation. The vomit reflex is the region located in the pons. The vomit reflex is controlled by the pons and medulla oblongata. But the body balance is coordinated by the cerebellum. So, the correct answer is option D.