it makes you happier because laughing is a genuinely happy gesture that people make when they are joyful and relaxing is a very comforting thing. by relaxing it helps your body take a break and your mind relax so when your stressed doing these things will help alot.
By using relaxing/ laughing as a coping strategy, it’ll make you spend time with people who make you laugh, and make you participate in activities that make you happy and laugh. It also improves your immune system. Relaxing also helps recharge your batteries.