Final answer:
The correct statement by the father of a child with undescended testicles that indicates an understanding of the information presented is: Testicles should descend by puberty.
Step-by-step explanation:
The correct statement by the father of a child with undescended testicles that indicates an understanding of the information presented is: Testicles should descend by puberty. Undescended testicles, also known as cryptorchidism, is a common condition where one or both testicles fail to descend into the scrotum. It is important for the testicles to descend by puberty as it allows for proper development and function of the male reproductive system.