As the nurse conducting the assessment for the toddler, which milestone should you prioritize in evaluating the toddler’s growth and development ?

The Antiporda family brings in their 18-month-old toddler for a routine check-up. The toddler’s parents express concerns about their child not walking yet, despite being able to crawl and stand with support. The toddler is active, responsive, and has a good appetite. The parents report no significant medical history or developmental delays.