Final answer:
The school nurse should consider the possibility of sexual abuse, emotional neglect, physical neglect, or incest when assessing a 12-year-old female showing sudden behavioral changes, including avoidance of physical activities and refusal to eat. A multidisciplinary approach may be necessary for the child's safety and wellbeing.
Step-by-step explanation:
When assessing a 12-year-old female who suddenly refuses to change for gym, participate in activities, has difficulty walking and sitting, and will not eat her food at lunchtime, the school nurse should consider the possibility of sexual abuse. The behavioral changes, like avoiding physical activities and refraining from eating, can be indicative of trauma and should be approached with sensitivity. Other possibilities include emotional neglect, physical neglect, or incest. According to the information available, many children suffer from a combination of forms of abuse with a high percentage involving parents or other relatives. In this case, a multidisciplinary approach involving counselors, social workers, and possibly law enforcement may be necessary to ensure the child's safety and wellbeing.