Final answer:
The successful functioning of children who have had a cerebral hemisphere removed shows the value of plasticity in the brain.
Step-by-step explanation:
The successful functioning of children who have experienced the surgical removal of an entire cerebral hemisphere best illustrates the value of plasticity. Plasticity refers to how the nervous system can change and adapt in response to damage or injury. In the case of children with immature nervous systems, their brains are able to compensate for the loss of one hemisphere and still function relatively well. This indicates the remarkable ability of the brain to reorganize and adapt to new circumstances.