Final answer:
Problems with speech and balance reported during a physical examination indicate a problem with the nervous system, which controls thought, movement, and coordination.
Step-by-step explanation:
The symptoms of problems with speech and balance are indicative of a problem with the nervous system. The nervous system controls sensation, thought, movement, and virtually all other body activities, including motor movement and coordination.
Issues with speech and balance often arise from neurological conditions affecting the brain or other parts of the nervous system. For instance, a stroke can impair neurological function, leading to such symptoms. Notably, both speech and balance are complex functions that require the precise coordination of multiple brain areas and neural pathways. When there is a disruption in these areas, due to injury, disease, or other factors, an individual may experience difficulties with these functions.
The nervous system also works in concert with the muscular and skeletal systems to facilitate movement and maintain balance. Therefore, when neurological issues arise, they can manifest in the ability to speak, maintain balance, and coordinate movements, confirming that the nervous system is the system in question from the choices provided.