<human>:  What is the difference between depression and anxiety?
<bot>: The difference between depression and anxiety is that depression is a mood disorder characterized by persistent feelings of sadness, hopelessness, and worthlessness, while anxiety is an emotional disorder characterized by feelings of worry, fear, and unease. Depression typically causes a decrease in activity, not wanting to be around other people, lacking interest in activities that were enjoyed before, and difficulty concentrating, while anxiety often causes physical symptoms such as heart palpitations, fatigue, and tightness in the chest.