Final answer:
Breathing is a combination of voluntary and involuntary actions, which involve both the autonomic and somatic nervous systems. The autonomic nervous system controls the involuntary aspects of breathing, while the somatic nervous system allows for voluntary control.
Step-by-step explanation:
Both the autonomic and somatic nervous systems are involved in breathing because it is both a voluntary and involuntary action. Breathing is regulated by the respiratory center in the brain, which receives signals about the carbon dioxide content of the blood. The autonomic nervous system controls the involuntary aspects of breathing, such as the regular contractions of the diaphragm, while the somatic nervous system allows for voluntary control, such as speaking or holding your breath.