Which finding during a preschool assessment warrants further evaluation by the nurse?

Gaining only 2 pounds (0.9 kg) in a year is a concern that warrants further evaluation. In preschool-aged children, a healthy growth pattern typically includes steady weight gain; on average, children in this age group should gain about 4 to 5 pounds annually. Such limited weight gain may indicate nutritional deficiencies, potential health issues, or inadequate caloric intake, making it essential for the nurse to investigate further to ensure the child's overall growth and development are on track.

The other options reflect typical developmental milestones for preschoolers. Riding a tricycle showcases gross motor skills development, talking about an imaginary friend indicates social and cognitive development, and dressing independently demonstrates self-help skills that are expected during this stage. Consequently, these behaviors are considered normal and do not require further assessment in the context presented.