The fact that the cerebrum is still developing during adolescence explains why teenagers act the way that they do is because their brain cannot yet fully comprehend some of the things that they do.
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Some common mental signs of eating disorders are low self-esteem of one's self, social withdrawal, fear of eating with other people, mood swings, anxiety, and many more red flags. Eating disorders are more mental disorders than digestive disorders because they severely impact a person's view of themselves.
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use a dictionary to find the meanings and also take help from the text book material
I'm almost positive that this is DNA. LMK if I'm correct.