Summary: The text discusses the impact of biological and environmental factors on the development of depression and anxiety disorders in adults. It highlights how genetic predisposition, brain chemistry imbalance, and childhood experiences can all contribute to the manifestation of these mental health conditions. Environmental factors such as stress, trauma, and social support are also explored as influences on the development and severity of depression and anxiety. The text emphasizes the importance of early intervention and holistic treatment approaches that consider both biological and environmental factors to effectively manage and alleviate symptoms of these common mental health disorders in adults.