3-5 days is how long you can go without water
100% true. Unhealthy food has fat calories which cause weight gain. If the diet is a healthy one with no fat calories, you will not gain fat. Exercise is also key as it burns calories and reduces chances of various diseases that come with being overweight.
2. improves the health of your muscles and I would think 1. considered exercise but the part with some of the time throws me off
Joes way of hanging out with the wrong people can be a big factor of the problem with his substance addiction