Final answer:
The symptoms of 'nervios' include depression, anger, and melancholy.
Step-by-step explanation:
The symptoms of the culture-specific illness 'nervios' that occurs among children in South America are depression, anger, and melancholy (option B). These symptoms are characteristic of the condition and can be attributed to the cultural context. Nervios is considered to be a culture-bound syndrome, meaning it is specific to certain cultures and not biologically based.