Final answer:
The nurse can ease the child's separation anxiety by surrounding them with familiar items from home and providing engaging activities.
Step-by-step explanation:
The action by the nurse that helps to ease the feelings of separation from home for a child whose parents are unable to stay with them for long hours is surrounding the child with familiar items. This can include things like the child's own blanket, toys, or photographs of their family, which can provide comfort and a sense of familiarity. Additionally, other supportive actions may involve providing musical, visual, or tactile activities to engage the child and overall encourage a comforting environment.