Final answer:
The community health nurse should view this family constellation as normal because cultural variations exist in the family life cycle.
Step-by-step explanation:
The community health nurse should view this family constellation as normal, because cultural variations exist in the family life cycle. It is important to recognize that there are different types of family structures and that each one can provide a nurturing and supportive environment for a child. In this case, the girl is living with her grandmother and her older stepbrother, who is very involved in her life. The grandmother is taking on the role of the primary caregiver, which is a common arrangement in many families.