Step 1: Understanding the Concept:
Self-help features in children's garments are design adaptations that encourage independence, motor-skill development, and confidence by allowing children to dress and undress themselves without adult assistance.
Step 2: Detailed Explanation:
Let us analyze the design features for preschoolers (ages 3 to 5 years):
1. Front openings (A): Front openings are the most critical self-help feature because they are highly visible and accessible to the child. The child can easily see the fasteners, manipulate them, and slide the garment on and off.
2. Back openings (B): Require assistance from an adult as the child cannot see or reach the back easily.
3. Fitted armholes (C): Restrict movement and make dressing difficult for a child with developing motor skills.
4. Buttons (D): Small buttons are much harder for a preschooler to manipulate than large, smooth zippers or velcro.
Thus, front openings are the ideal self-help feature.
Step 3: Final Answer
The correct option is (A).