In the ICF framework, body function refers to which of the following?

• A. Sensory functions
• B. The physiological functions of body systems (what they do)
• C. Mobility and self-care tasks
• D. Environmental factors affecting function

Answer: (B)

In the ICF, body function means the physiological functions of body systems—the operations or activities that the body parts perform. This covers a wide range of functions, such as sensory processing, mental functions, movement, digestion, heart and lung functions, and more. The key idea is that it’s about what the body parts do, not about the tasks a person carries out or the environment around them. That’s why this description fits best: it encompasses the actual operations of the body's systems, rather than activities or environmental factors. The other options point to activities (what someone does) or external influences, which are not body functions themselves.