In Which of the Following Does the Environment Play a Causal

Question

In which of the following does the environment play a causal role?  
A) Marfan syndrome
B) Cystic fibrosis
C) Dog coat color
D) Sickle-cell anemia
E) Depression and schizophrenia

Accepted Answer

Depression and schizophrenia are both influenced by environmental factors such as stress, trauma, and social support. While genetic factors may contribute to an individual's susceptibility to these conditions, the environment plays a significant role in their development and severity. A, B, C, and D are all primarily genetic conditions that are not directly caused by environmental factors.