Final answer:
The Subjective Global Assessment (SGA) is the tool that evaluates subcutaneous fat and muscle wasting to assess nutritional status. The correct option is 3.
Step-by-step explanation:
The nutrition assessment tool that includes evaluating subcutaneous fat and muscle wasting at multiple body sites to determine nutritional status is the Subjective Global Assessment (SGA).
The SGA is a clinical tool used by healthcare professionals to assess nutritional status based on a patient's history and physical examination, which encompasses factors like weight loss, dietary intake changes, gastrointestinal symptoms, functional capacity, and physical signs of nutrition depletion including loss of subcutaneous fat and muscle wasting.