Please choose the correct ending to complete the given sentence: Health: [header] How to stop frowning [title] Remind yourself that smiling and laughter is good for body and soul. [step] Smiling more and incorporating laughter into your daily life has a positive impact on your overall well-being. Smiling and laughter is also contagious, so you may be able to influence the moods of those around you.

Ending1: [substeps] Smiling and laughing can also help to decrease stress. When you are smiling and laughing, your stress levels decrease, similar to the way that exercising causes your body to release feel-good chemicals called endorphins. Ending2: Smile a lot, shake your head a bit more, and simply smile. You will get more positive expressions from your smile and will also make it easier to truly put your teeth together. Ending3: [substeps] Try to avoid thinking negatively about someone-or anything negative about the person. This can add negativity to your life (even that person won't affect your happiness) as a result. Ending4: Realizing that you are smiling at things in the world without them being absurd or ridiculous in nature can help you get out of your slump and motivate you to smile more often. [substeps] Smile at many people at work, school, or anywhere that you can make good eye contact with them.

Answer format: ending1/ending2/ending3/ending4