Passive range of motion exercises are essential because they:

Passive range of motion exercises are essential because they help maintain joint flexibility in immobile patients. When patients cannot move independently due to health conditions, surgeries, or prolonged bed rest, their joints can become stiff and the muscles can weaken. By performing passive range of motion exercises, caregivers can gently move the patient's limbs through their normal range of motion. This movement helps prevent contractures, maintains flexibility, and promotes circulation, ultimately contributing to the patient's overall health and comfort.

Other options do not accurately represent the purpose of passive range of motion exercises; they are not guaranteed to be effective for every patient due to various individual circumstances. The exercises do not focus solely on strength improvement; rather, their primary aim is to maintain flexibility, not to build muscle strength. Additionally, while they might often be included in a comprehensive care regimen, they are not universally mandated in all patient care scenarios. Thus, the most accurate choice emphasizes their role in maintaining joint flexibility for those who are unable to move on their own.