"Pacemaker" is the one choice among the following choices given in the question that is the treatment that can also regulate heart rhythmsthat has replaced drugs in some cases. The correct option among all the options that are given in the question is the first option or option "A". I hope it helps you.
What I have found says it belongs to the <span> voluntary respiration </span><span>system.</span>
The eating disorder of this is most likely anorexia nervous
