Final answer:
The completion of the synaptic pruning process is crucial for a fully mature brain.
Step-by-step explanation:
The Completion of Synaptic Pruning Process is the Key to a Fully Mature Brain
The brain undergoes significant changes during adolescence that contribute to its maturation. One important process is synaptic pruning, where unused neural pathways are eliminated, leading to a more efficient and functional brain. This pruning process occurs alongside other developmental changes, such as increased complexity in the cerebral cortex and myelination.