Ans: Losing weight can be difficult, but it is not impossible. A 20-year-old can lose weight safely and effectively by following a healthy diet and exercise regime. It is important to set realistic goals and to be patient, as weight loss does not happen overnight. Drinking plenty of water, eating plenty of fruits and vegetables, and avoiding processed foods are all important steps in maintaining a healthy diet. Regular exercise is also key; aim for at least 30 minutes of aerobic activity per day. If you stick to a healthy diet and exercise regularly, you will see results over time.