Final answer:
Larry should complete an Advanced directive to ensure his children respect his wishes in making medical decisions if he becomes unable to do so.
Step-by-step explanation:
If Larry wants to ensure that his children respect his wishes regarding his medical decisions if he becomes unable to make them himself, he should complete an Advanced directive. An advanced directive is a legal document that specifies a person's preferences for medical treatment in case they cannot communicate their wishes. It allows Larry to appoint a healthcare proxy who will make decisions on his behalf.
Learn more about Advanced directive