What effect does the use of a basic hand tool like a screwdriver do to your body? a. it increases your level of physical activity. b. it descreases your level of physical activity. c. it does not affect your level of physical activity. d. it lowers your risk of injury.

C is the correct answer. While a basic hand tool, such as a screwdriver, requires effort to use and you therefore expand energy while using it, it does not significantly affect your level of physical activity. Exercise, for example, would more affect your level of physical activity.