Final answer:
The father should be advised to look out for signs of persistent fever or discomfort, frequent urination with little urine, and other symptoms like cloudy or foul-smelling urine, which all point to a potential urinary tract infection.
Step-by-step explanation:
If a father is asking about signs and symptoms to watch for that might indicate the recurrence of a urinary tract infection (UTI) in his child, he should be advised to look for symptoms such as persistent fever or discomfort, which is option 3 in the list provided. Other symptoms to be aware of include a burning feeling when the child urinates, frequent or intense urges to urinate even with little urine to pass, pain in the back or side below the ribs, cloudy, dark, bloody, or foul-smelling urine, fever, or chills.