Final answer:
The nurse should identify Option 1: Increased urine output and low specific gravity as an indication that the child is developing diabetes insipidus.
Step-by-step explanation:
The nurse should identify Option 1: Increased urine output and low specific gravity as an indication that the child is developing diabetes insipidus. Diabetes insipidus is a condition characterized by excessive thirst and frequent urination. In this condition, the kidneys are unable to properly concentrate urine, leading to increased urine output and low specific gravity.
Diabetes insipidus is caused by a deficiency or malfunction of antidiuretic hormone (ADH). ADH helps in the reabsorption of water by the kidneys. When ADH is deficient or doesn't function properly, the kidneys are unable to concentrate urine, resulting in increased urine output.
Examples of other conditions that can cause polyuria (increased urine output) include uncontrolled diabetes mellitus and excessive water intake.