Significant brain development of the is finally completed during emerging adulthood.

Prefrontal Cortex

Explanation:

The Prefrontal Cortex is the part of the brain which does not fully develop until the adult years. The complete development of the prefrontal cortex occur between 18 - 25 years.

The prefrontal cortex remains under construction during the adolescent years. In humans, the prefrontal cortex is located in the front part of the frontal lobe. It's an important site of the brain for working memory.

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