Final answer:
Physical Therapy is the discipline that addresses musculoskeletal disorders and is directly related to staff providing resident care.
Step-by-step explanation:
The discipline that addresses musculoskeletal disorders (MDS) and is directly related to staff that provide resident care is Physical Therapy. Physical therapists are healthcare professionals who specialize in assessing, diagnosing, and treating musculoskeletal conditions that affect the normal functioning of the body. They utilize various physical modalities, exercises, and techniques to alleviate pain, improve mobility, and enhance overall physical function.