The autonomic division of the nervous system controls unconscious life -sustaining activities is involved in learning is involved in conscious thought all of the above controls voluntary muscles

The correct answer is **controls unconscious life-sustaining activities**.<br /><br />The autonomic nervous system regulates functions like heart rate, digestion, and breathing, which are essential for life and happen automatically without conscious control. The other options are incorrect:<br /><br />* **Is involved in learning:** Learning primarily involves the central nervous system (brain and spinal cord).<br />* **Is involved in conscious thought:** Conscious thought is also a function of the central nervous system.<br />* **All of the above:** This is incorrect because the previous two points are false.<br />* **Controls voluntary muscles:** Voluntary muscle control is handled by the *somatic* nervous system, not the autonomic nervous system.<br />