Final answer:
False. Overthinking is not the biggest cause of unhappiness. Stay occupied, focus on helpful things, and think positively.
Step-by-step explanation:
False. Overthinking is not the biggest cause of our unhappiness. While overthinking can contribute to negative emotions, there are many factors that can affect our happiness. It is important to keep yourself occupied and focus on things that help you rather than dwelling on negative thoughts. Thinking positively can also be helpful in promoting happiness and well-being.