While he is giving a presentation at a community center on depression, Israel hosts a Q&A session. One of the participants asks Israel a question: So is depression caused by nature or by nurture? What would be the most accurate answer that Israel could give?
a) Depression is caused by both genetic predispositions and environmental factors
b) Depression is solely caused by genetic factors
c) Depression is solely caused by environmental factors
d) Depression is caused by neither genetic nor environmental factors
