Which of the following is NOT one of the six interrelated categories of behavior that, if significantly reduced, lowers the rate of preventable diseases (such as cardiovascular disease, HIV/AIDS, lung
diseases, etc.)?

gargle with salt water; gargling with warm salt water can soothe a scratchy throatsuck on a lozengetry otc pain reliefenjoy a drop of honeytry an echinacea and sage spraystay hydrateduse a humidifiergive yourself a steam shower

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Iwould say a is correct

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.