Final answer:
The nurse's priority should be a child with a heart rate of 110 beats per minute, as this may indicate an underlying health issue or distress.
Step-by-step explanation:
The nurse's priority in this situation would be a child with a heart rate of 110 beats per minute. A normal heart rate for a child is between 60 and 100 beats per minute. A heart rate of 110 beats per minute is considered tachycardia, which may indicate an underlying health issue or be a sign of distress.