Final answer:
Gross motor skills such as riding a tricycle are acquired through brain maturation and practice.
Step-by-step explanation:
Gross motor skills such as riding a tricycle are acquired through brain maturation and practice. Motor development occurs in an orderly sequence as infants move from reflexive reactions to more advanced motor functioning. For example, babies first learn to hold their heads up, then to sit with assistance, and then to sit unassisted, followed later by crawling and then walking.