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When a five-year-old like Drew's temper tantrums start to diminish and he gains better control over his emotions, it indicates positive changes in his brain development. Let's break down the options:
1. **His brain chemistry is more regular:** This option is not directly related to the improvement in controlling emotions. Brain chemistry being regular doesn't necessarily mean better emotional regulation.
2. **His prefrontal cortex is becoming more developed:** The prefrontal cortex is responsible for decision-making, problem-solving, and regulating emotions. As Drew gains better control over his emotions, it suggests that his prefrontal cortex is indeed becoming more developed, allowing him to manage his feelings more effectively.
3. **The language area in his brain is more developed:** While language development is crucial for communication skills, it's not directly linked to temper tantrum reduction or emotional control.
4. **His thinking has developed to the concrete operational stage:** The concrete operational stage in Piaget's theory of cognitive development occurs around ages 7-11 and is characterized by logical thought and understanding of conservation. Drew, being five years old, is more likely experiencing progress in emotional regulation linked to prefrontal cortex development rather than reaching the concrete operational stage.
Therefore, the most suitable answer in the context of Drew's improved emotional control would be **B. his prefrontal cortex is becoming more developed**. This indicates that Drew's brain is advancing in a way that allows him to manage his emotions more effectively.
