Final answer:
Exercise of the stepping reflex in infancy contributes to the development of motor skills necessary for walking later on by establishing neural pathways and muscle coordination.
Step-by-step explanation:
The statement that exercise of the stepping reflex helps the brain's cortex to develop the ability to walk later on is True. The stepping reflex is an example of procedural learning where the cerebellum coordinates motor development. This reflex, present in infants, lays the groundwork for complex motor skills, such as walking, by establishing neural pathways crucial for balance and coordination. Early reflex activities like stepping are vital as they enable the necessary muscle strength and neurological pattern formation that facilitate voluntary movement and gait.