What should a nurse explain to parents about their toddler's protruding abdomen?

The correct choice highlights that toddlers often exhibit a protruding abdomen due to immature muscle development. During early childhood, the abdominal muscles are not as well developed as those in older children and adults, which can lead to a more pronounced belly appearance. This is normal in toddlers as their bodies are still growing and maturing, particularly the abdominal muscles, which will strengthen over time.

Understanding this concept is essential for parents as it helps reassure them that a rounded abdomen in their toddler is typically a variation of normal physiology and not a cause for concern. It fosters a better understanding of developmental milestones and alleviates potential anxiety regarding their child's health. Recognizing that a protruding abdomen is common in this age group can also prevent misunderstandings about growth and nutrition during a critical period of development.