Explanation:
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The behavioral activation system is associated wit PLEASANT MOOD. Behavioral activation system is neuro-behavioral system that control positive affect and stimulate appropriate behaviors in response to rewards based on personality factors. The system is associated with low to moderate arousal, pleasant mood and tendency to approach new objects.
Enlargement of the breasts would be your answer
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the answer is
C.
During exercise the brain releases endorphins, the chemicals that help improve our mood.
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