Mental illness in children can be defined as:

Correct Answer: D

Rationale: Mental illness in children encompasses a broad range of symptoms and behaviors, including distorted self-perception, difficulty adhering to societal or environmental expectations, and impaired insight into their own capabilities and the consequences of their actions. Option D includes all these aspects, making it the most comprehensive and correct definition.

Correct Answer: C

Rationale: Learning disabilities have a strong genetic basis, with research showing hereditary patterns in conditions like dyslexia. While nutrition (A) and environment (B) can influence development, and TV (D) may affect attention, genetics (C) is the most scientifically established cause.

Correct Answer: C

Rationale: Borderline personality disorder benefits from a strong support network to manage emotional instability. Family and friends (C) provide stability, unlike the less specific (A, B) or inappropriate (D) options.

Correct Answer: A

Rationale: Routine screening for depression at every physician visit (A) aligns with guidelines to catch mental health issues early in adolescents, who may not self-report symptoms.

Correct Answer: B

Rationale: Separation anxiety (B) is prevalent in toddlers, who fear being apart from caregivers, aligning with their developmental stage. Test (A) and school (D) anxiety apply to older children, and situational (C) is less specific.