Answer: Number 4
Step-by-step explanation:
The statement by the parents which satisfies the nurse because it shows that they understand the principles of care is :
4-Encourage the child to engage in low-intensity activities
Low-intensity activities are recommended because arduous exercise leads to augmented cellular metabolism. This, in turn, results in tissue hypoxia, which can precipitate the production of sickle-shaped red blood cells and therefore anemia.