Final answer:
Walking is not controlled by the autonomic nervous system, but is controlled by the somatic nervous system. Other functions controlled by the autonomic nervous system include digestion, heartbeat, and temperature regulation.
Step-by-step explanation:
The autonomic nervous system controls involuntary functions in the body. Out of the given options, walking is not controlled by the autonomic nervous system. Walking is a voluntary movement that is controlled by the somatic nervous system. The autonomic nervous system controls functions such as digestion, heartbeat, and temperature regulation.