Cotton is the most suitable fiber for infant clothing because it is natural, soft, breathable, non-allergenic, highly absorbent, and does not irritate delicate infant skin.

Language development milestones in infants occur in the chronological sequence:

• Crying (B) - from birth
• Cooing (A) - 6 to 8 weeks
• Babbling (C) - 6 to 9 months
• Single Word / Holophrastic stage (D) - 10 to 12 months.

Stages of child and adolescent development:

• Birth to 2 years represents Infancy and Toddlerhood.
• to 5 years represents Early Childhood (Preschool years).
• 6 to 11 years represents Middle/Late Childhood (School age).
• 12 to 15 years denotes the core adolescent / early-to-mid adolescence transitional stage marked by puberty and rapid physical and cognitive change.

Thermal behavior and combustibility of textile fibers:

• Vegetable fibers (cotton, linen) are cellulosic and highly flammable, burning easily with a light ash.
• Animal fibers (wool, silk) are protein fibers; they burn slowly and self-extinguish but are not inherently fireproof.
• Mineral-based fibers (such as asbestos and fiberglass) are inorganic and completely incombustible, possessing natural fireproof resistance.
• Most synthetic polymers melt and burn readily unless treated with chemical flame retardants.