Final answer:
The involuntary control of breathing originates in the 4) pons and medulla of the brainstem.
Step-by-step explanation:
The involuntary control of breathing originates in the pons and medulla of the brainstem. These respiratory centers automatically regulate the rate of breathing based on the body's needs, primarily influenced by blood acidity or pH. The brainstem, which consists of the midbrain, pons, and medulla, is responsible for controlling basic body functions, including breathing.