Someone attempting to take their own life is called suicide. It can happen to anyone, but usually to people with lower self-esteem, people who are being bullied, or people going through difficult times. Usually, you can tell if someone is planning on committing suicide, and you should let a trusted adult know. Hope this helps!
Cardio fitness is good for you. Cardio fitness makes you stay fit. Cardio fitness allows you to stay healthy. Cardio fitness allows to live longer. Cardio fitness also makes you look better, as in appearance as you're not fat.