How does the use of a basic hand tool like a screwdriver affect your health?
It increases your level of physical activity.
It descreases your level of physical activity.
It does not affect your level of physical activity.
It lowers your risk of injury.
I'd say that it affects your health by 'increasing your level of physical activity', because it is important to be active, and even the use of a basic hand tool like a screwdriver can impact that.
