Final answer:
The correct option is b) Limbic system.
A person with autism often shows deficits in the limbic system. The frontal lobes are fully mature by 25 years old and are key to cognitive functions. The cerebrum, including the limbic system and basal ganglia, facilitates complex processes like language.
Step-by-step explanation:
Current neuroscience studies show that by the time of full brain development, a person with autism shows deficits in the areas that make up the limbic system. These deficits can manifest as challenges with social interactions, communication, and sometimes restrictive and repetitive behaviors often associated with Autism Spectrum Disorder (ASD).
The frontal lobes become fully developed by 25 years old and are responsible for planning, reasoning, memory, and impulse control. In contrast, the limbic system plays a pivotal role in emotion, behavior, and long-term memory, which are areas often impacted by autism.
The cerebrum or cortex comprises the frontal, temporal, occipital, and parietal lobes, as well as structures like the basal ganglia and the limbic system, facilitating complex functions such as language, which involves multiple brain regions.